https://status.dal.ca/ RSS feed of the Dalhousie Status Page updates. en-ca Tue, 15 Apr 2025 11:25:31 America/Halifax Copyright 2017 Dalhousie University. https://status.dal.ca/rss.php https://status.dal.ca/service.php?Service=36 2025-04-10 11:22:42 CHANGE CONTROL NOTICE

Type Of Work: Project

Customer: Canary NOC

Change Control ID : 1999786

Start Date (yyyy-mm-dd): 2025-04-24

End Date (yyyy-mm-dd): 2025-04-24

Country: Canada

Location Of Work: Musquodoboit Harbour, NS

Reason For Work: OSP Forced Relocate

Release Window (24 hr format): 00:01 - 06:00 Atlantic

Affected Circuits:
00152705 - Canary NOC - Memorial University 228 Elizabeth Ave, St John's, NL <> Dalhousie 6225 University Ave, Halifax, NS

Service Interruption Duration: 2 hours

Service Impact:
Your services will be impacted while we do a forced fibre relocate. https://status.dal.ca/service.php?Service=36 2025-03-10 15:51:35 CHANGE CONTROL NOTICE

Type Of Work: Maintenance

Customer: ACORN NS

Change Control ID : 1972773

Start Date (yyyy-mm-dd): 2025-04-16
End Date (yyyy-mm-dd): 2025-04-16

Location Of Work: Halifax, NS

Reason For Work: Software Upgrade

Release Window (24 hr format): 00:01 - 06:00 Atlantic

Affected Circuits:
00144397 - acorn-ytwr-1 - 6080 Young Street, Halifax, NS
00117119 - Management and monitoring for ACORN - 6080 Young Street, Halifax, NS

Service Interruption Duration: 6 hours

Service Impact:
Your services will be impacted while we do planned software upgrade. https://status.dal.ca/service.php?Service=37 2025-03-10 15:50:11 CHANGE CONTROL NOTICE

Type Of Work: Maintenance

Customer: Dalhousie

Change Control ID : 1972773

Start Date (yyyy-mm-dd): 2025-04-16

End Date (yyyy-mm-dd): 2025-04-16

Location Of Work: Halifax, NS

Reason For Work: Software Upgrade

Release Window (24 hr format): 00:01 - 06:00 Atlantic

Affected Circuits:
00144524 - DAL MS Teams - 6080 Young Street, Halifax, NS
00144384 - DAL MS Teams - 6080 Young Street, Halifax, NS
00144385 - DAL MS Teams - 6080 Young Street, Halifax, NS
00144386 - DAL MS Teams - 6080 Young Street, Halifax, NS

Service Interruption Duration: 6 hours

Service Impact:
Your services will be impacted while we do planned software upgrade. https://status.dal.ca/service.php?Service=39 2025-04-15 08:48:27 Possible delays or problems when accessing Microsoft Teams

Issue ID: TM1055900
Affected services: Microsoft Teams
Status: Service degradation
Issue type: Advisory
Start time: Apr 15, 2025, 7:56 AM ADT

User impact
Some customers have reported issues with accessing the service, or using features in Microsoft Teams.


Current status
Apr 15, 2025, 7:56 AM ADT
We’re looking into your reported issue and checking for impact to your organization. We'll provide an update within one hour. https://status.dal.ca/service.php?Service=6 2025-04-14 09:59:36 EXCHANGE NOTICE
Some users may be intermittently unable to access Exchange Online any connection methods
Service Restored

More info: Examples of impacted connection methods were:
- Outlook on the web
- Messaging API (MAPI)
- Representational State Transfer (REST)
- Exchange ActiveSync (EAS)
Final status: The service provider has determined that a portion of Exchange Online infrastructure which facilitates access to Exchange Online mailboxes through the impacted connection methods wasn't performing as efficiently as expected and resulted in intermittent access issues. Their automated recovery system restarted the affected portion of infrastructure, and they've confirmed with monitoring telemetry that the impact is resolved.
Scope of impact: Some users located in Canada may have intermittently been affected by this issue when attempting to access their mailboxes using any connection methods.
Start time: Sunday, April 13, 2025, at 10:47 PM AST
End time: Monday, April 14, 2025, at 11:47 AM AST https://status.dal.ca/service.php?Service=6 2025-04-14 09:46:06 EXCHANGE NOTICE
Some users may have been unable to access their mailbox via multiple connection methods
Service restored

More info: Impacted connection methods included, but weren't limited to:
- Outlook on the web
- Messaging API (MAPI)
- Exchange ActiveSync (EAS)
- Representational State Transfer (REST)
Final status: The service provider has identified that a component of infrastructure, responsible for facilitating mailbox access, was unresponsive and resulted in impact. They've restarted the affected component and confirmed impact has been remediated.
Scope of impact: Impact was specific to some users who were located or served through the affected infrastructure in Canada.
Start time: Saturday, April 12, 2025, at 6:17 AM AST
End time: Saturday, April 12, 2025, at 7:22 AM AST https://status.dal.ca/service.php?Service=6 2025-04-14 09:43:48 EXCHANGE NOTICE
Users may be intermittently unable to see app installations or definitions within any Outlook connection method
Service Restored

Final status: After the process of increasing our service's ability to handle large amounts of traffic completed, the service provider performed an extended period of monitoring service telemetry to ensure that the aforementioned change didn't bring about any adverse effects and later confirmed that the issue has been resolved.
Scope of impact: Your organization was affected by this event, and some users who attempted to view installed apps or add-ins within any Outlook connection method were intermittently impacted.
Start time: Sunday, April 6, 2025, at 12:15 PM AST
End time: Friday, April 11, 2025, at 1:36 PM AST https://status.dal.ca/service.php?Service=39 2025-04-14 09:32:24 TEAMS NOTICE
Users may be unable to utilize avatar and video filtering features in Teams for Mac
Service Degradation

Current status: As a result of this issue, the service provider has disabled the avatar and video filtering features in Teams for Mac to resolve crashes which were previously occurring for users. They're developing a code fix which they intend to include in their next build update to permanently resolve the crashing issue. Once this code fix has deployed, they'll re-enable the avatar and video filtering features. https://status.dal.ca/service.php?Service=39 2025-04-14 09:32:42 TEAMS NOTICE
Users with specific access policy configurations may be unable to retrieve new voicemails in Teams
Service Degradation

More info: Affected users can still see voicemail notifications appear but can't access them. As a workaround, affected users can use Outlook to access their voicemails.
Current status: The service provider has further identified that, due to the previously mentioned latent code issue, authentication checks which occur when users request access to their voicemail in Teams are failing if the presented token, which is leveraged to facilitate authentication between users and the service, is invalidated based on conditional access evaluation that occurs as a result of conditional access policies applied to these users; and the authentication processes fails to properly request a new token. They're developing a code fix to ensure the conditional access evaluation process will process and retry tokens correctly as expected. https://status.dal.ca/service.php?Service=39 2025-04-14 09:35:17 TEAMS NOTICE
Users are experiencing failures when attempting to join channel meetings in Teams
Service Restored

More info: Impact was specific to users on the desktop client or web app that were joining channel meetings from the new calendar experience, or users being nudged into these channel meetings.
Users weren't seeing an error, the action simply failed.
While the service provider was working to remediate impact, affected users could still join channel meetings using the classic Teams calendar, the Teams mobile apps, or by joining the meeting directly through the channel.
Final status: The service provider has confirmed that the fix as completed deployment and validated remediation using service telemetry.
Scope of impact: Your organization was affected by this event, and any user attempting to join Teams channel meetings using the new calendar experience or nudge from the Teams desktop and web clients was impacted.
Start time: Wednesday, March 5, 2025, at 9:00 AM AST
End time: Tuesday, April 8, 2025, at 9:00 PM AST https://status.dal.ca/service.php?Service=39 2025-04-14 09:42:29 TEAMS NOTICE
Some users aren't receiving background Walkie Talkie transmissions in the Teams iOS app
Service Restored

Final status: The service provider's monitoring has identified an increase in failures for background transmissions with the Walkie Talkie service in Teams. Their investigation identified that an authentication component didn't update as expected, resulting in impact. They've updated the component and validated this has remediated impact using service telemetry.
Scope of impact: Your organization was impacted by this event and impact was limited to a subset of users receiving Walkie Talkie transmissions in the background on iOS devices.
Start time: Wednesday, April 9, 2025, at 1:00 PM AST
End time: Friday, April 11, 2025, at 5:01 PM AST https://status.dal.ca/service.php?Service=17 2025-04-14 07:09:22 Issue has been resolved. https://status.dal.ca/service.php?Service=9 2025-04-14 07:08:45 Issue has been resolved. https://status.dal.ca/service.php?Service=17 2025-04-13 20:12:48 Wireless network outage on the 2nd floor of the Henry Hicks building.
Electrical work has resulted in no power to the network equipment on the 2nd floor. https://status.dal.ca/service.php?Service=9 2025-04-13 20:12:10 Network outage on the 2nd floor of the Henry Hicks building.
Electrical work has resulted in no power to the network equipment on the 2nd floor. https://status.dal.ca/service.php?Service=36 2025-04-11 10:09:19 CHANGE CONTROL NOTICE
Service Restored https://status.dal.ca/service.php?Service=6 2025-04-11 09:55:46 EXCHANGE NOTICE
Users may be intermittently unable to see app installations or definitions within any Outlook connection method
Service Degradation

Current status: the service provider has identified a recent change to optimize their service which introduced an issue that resulted in an inordinate amount of traffic volume, causing users to be intermittently unable to see app installations or definitions within any Outlook connection method. While they've confirmed that impact isn't actively occurring, as of Monday, April 7, 2025, at 1:10 PM AST, they're working to develop a solution to ensure that this issue doesn't reoccur. https://status.dal.ca/service.php?Service=36 2025-03-18 10:51:53 Eastlink New Change Control Notice


Type Of Work: Project

Customer: ACORN NS

Change Control ID : 1981414

Start Date (yyyy-mm-dd): 2025-04-11

End Date (yyyy-mm-dd): 2025-04-11

Country: Canada

Location Of Work: Halifax - NS

Reason For Work: Engineering Project

Release Window (24 hr format): 04:00 - 06:00 Atlantic

Affected Circuits:
00154284 - 100G DAL/ACORN - 233 Sambro Creek Rd, Sambro Creek, NS <> 84 Chain Lake Dr, Halifax, NS

Service Interruption Duration: less than 1 hour

Service Impact:
Your services will be impacted while we perform Core Transport maintenance https://status.dal.ca/service.php?Service=6 2025-04-11 09:58:07 EXCHANGE NOTICE
Some users may experience delays or timeout errors when accessing Exchange Online using multiple connection methods
Service Restored

More info: Affected connection methods were:
- Outlook on the web
- Exchange ActiveSync (EAS)
- Messaging API (MAPI)
- Representational State Transfer (REST)
Final status: While the service provider was in the process of investigate the source of the gateway timeout errors on the portion of infrastructure to further understand the root cause of the issue, system monitoring indicated that the service had returned to normal health. They've confirmed that the problem is no longer occurring, and they'll continue to monitor the service to ensure that the problem does not happen again.
Scope of impact: This issue may have affected any user hosted on the impacted infrastructure in Canada.
Start time: Thursday, April 10, 2025, at 3:52 PM AST
End time: Thursday, April 10, 2025, at 9:22 PM AST https://status.dal.ca/service.php?Service=36 2025-04-10 11:12:33 CHANGE CONTROL NOTICE
Service Restored

Update Information: Please note work was completed around 03:00 NL (02:30 Atlantic | 05:30 UTC)

Customer: Canary NOC
Change Control ID : 1977890
Start Date: 2025-04-10
End Date: 2025-04-10

Location Of Work: South Branch - NL

Reason For Work: Damaged Fiber Cables

Release Window (24 hr format): 00:01 - 06:00 Newfoundland

Affected Circuits:
00144649 - 10G Canarie Charlottetown to St Johns - UPEI Vet https://status.dal.ca/service.php?Service=36 2025-04-10 11:08:59 Eastlink New Change Control Notice


Type Of Work: Maintenance

Customer: Canary NOC

Change Control ID : 1977890

Start Date (yyyy-mm-dd): 2025-04-10

End Date (yyyy-mm-dd): 2025-04-10

Country: Canada

Location Of Work: South Branch - NL

Reason For Work: Damaged Fiber Cables

Release Window (24 hr format): 00:01 - 06:00 Newfoundland

Affected Circuits:
00144649 - 10G Canarie Charlottetown to St Johns - UPEI Vet

Service Interruption Duration: less than 1 hour

Service Impact:
Your services will be impacted while we perform repairs to Damaged Fiber Cables https://status.dal.ca/service.php?Service=36 2025-04-10 11:10:31 CHANGE CONTROL NOTICE
Service Restored

Customer: Canary NOC
Change Control ID : 1977884
Start Date: 2025-04-09
End Date: 2025-04-09

Location Of Work: Stephenville - NL

Reason For Work: Damaged Fiber Cables

Release Window (24 hr format): 00:01 - 06:00 Newfoundland

Affected Circuits:
00144649 - 10G Canarie Charlottetown to St Johns - UPEI Vet https://status.dal.ca/service.php?Service=21 2025-04-09 08:27:06 Active:

1) myDal/SharePoint pages may be failing to generate web part thumbnails. Impacted web parts include, but are not limited to:

- Hero
- News
- Quick links
- Highlighted content


Resolved:

1) Published articles may not show in the News web part within myDal/SharePoint sites. https://status.dal.ca/service.php?Service=36 2025-03-20 14:09:03 Eastlink New Change Control Notice


Type Of Work: Maintenance

Customer: Canary NOC

Change Control ID : 1977884

Start Date (yyyy-mm-dd): 2025-04-09

End Date (yyyy-mm-dd): 2025-04-09

Country: Canada

Location Of Work: Stephenville - NL

Reason For Work: Damaged Fiber Cables

Release Window (24 hr format): 00:01 - 06:00 Newfoundland

Affected Circuits:
00144649 - 10G Canarie Charlottetown to St Johns - UPEI Vet

Service Interruption Duration: less than 1 hour

Service Impact:
Your services will be impacted while we perform repairs to Damaged Fiber Cables https://status.dal.ca/service.php?Service=38 2025-04-08 10:50:52 M365 NOTICE
Users in Paraguay may see an incorrect time in multiple Microsoft 365 apps and services
Service Restored

User impact: Users in Paraguay may have seen an incorrect time in multiple M365 apps and services.
More info: Affected Office 365 web apps may have included the following:
- Outlook on the web
- Teams web client
- SharePoint Online web client
- Word web client
- Myaccount.microsoft.com
Final status: The service provider has confirmed that the deployment of the fix completed and validated with some users who initially reported the issue that the impact is remediated.

Start time: Saturday, March 22, 2025, at 8:00 PM AST
End time: Monday, April 7, 2025, at 3:00 PM AST https://status.dal.ca/service.php?Service=6 2025-04-08 15:10:20 EXCHANGE NOTICE
Users may be unable to view or access some public folders within the Outlook desktop client and Outlook on the web
Service Restored

More info: Additionally, affected users may have been unable to create new or delete some existing public folders within the Outlook desktop client and Outlook on the web.
Final status: The service provider has determined that their sync process is complete and their monitoring confirms that this issue is resolved.
Start time: Monday, January 27, 2025, at 2:30 PM AST
End time: Tuesday, April 7, 2025, at 3:38 PM AST https://status.dal.ca/service.php?Service=37 2025-04-11 15:33:27 Service restored https://status.dal.ca/service.php?Service=37 2025-04-07 15:26:42 PUSH TO TALK NOTICE

Start Date: Apr 08, 2025 23:30 AM AST
End Date: Apr 08, 2025 05:00 AM AST
Cause: Hardware - Software upgrade

Service Outage Details
Active calls will drop for the PTT. New calls can be initiated after 30 sec. Any subscriber will face the above-described impact twice during the maintenance window.

Impacted Services
Push to Talk https://status.dal.ca/service.php?Service=8 2025-04-07 16:11:25 Issues with authentication for the following have been resolved:

MyCareer
One45
ExamSoft https://status.dal.ca/service.php?Service=37 2025-04-07 15:28:14 PUSH TO TALK NOTICE
Start Date: Apr 08, 2025 23:30 AM AST
End Date: Apr 08, 2025 05:00 AM AST
Cause: Upgrade - Software

Service Outage Details
Active calls will drop for the PTT. New calls can be initiated after 30 sec. Any subscriber will face the above-described impact twice during the maintenance window.

Impacted Services
Push to Talk https://status.dal.ca/service.php?Service=8 2025-04-07 15:09:45 ITS has received reports of authentication issues with a few 3rd party cloud hosted applications including:

MyCareer
One45
ExamSoft

The team is actively troubleshooting the issues and will provide updates as we have more information. https://status.dal.ca/service.php?Service=21 2025-04-04 12:15:53 Active:

1) Published articles may not show in the News web part within myDal/SharePoint sites.

2) myDal/SharePoint pages may be failing to generate web part thumbnails. Impacted web parts include, but are not limited to:

- Hero
- News
- Quick links
- Highlighted content https://status.dal.ca/service.php?Service=9 2025-04-04 10:49:31 Please be advised that scheduled network maintenance will take place on Sunday, April 6th, from 5:00 AM to 8:00 AM. During this period, network services across the entire campus, including Truro and Dentistry, may experience intermittent disruptions lasting between 10 to 20 minutes. https://status.dal.ca/service.php?Service=39 2025-04-04 09:43:28 TEAMS NOTICE
Users' Teams for Mac client crashes when applying video filters or selecting avatars
Service Restored

Final status: After further assessment, the service provider has identified a code compatibility issue introduced by a recent service update that resulted in impact. To remediate this issue, they've disabled the offending change and after monitoring the service, they've verified that this change has successfully resolved the issue.
Start time: Tuesday, March 25, 2025, at 4:55 AM AST
End time: Wednesday, April 2, 2025, at 9:37 PM AST https://status.dal.ca/service.php?Service=6 2025-04-07 08:32:42 The existing issue with public folders doe not impact Dalhousie since that feature is not deployed. https://status.dal.ca/service.php?Service=39 2025-04-03 15:35:09 TEAMS NOTICE
Some users may see a draft chat message to a call queue in Teams
Service Degradation

More info: This issue is specifically affecting users who are set up as call queue agents.
Current status: The service provider has identified a recent update addressing certain call disconnect issues which is causing problems with some users configured as call queue agents. They're working on a code fix to address the issue and prevent further draft chat messages from appearing for affected users.
Scope of impact: Your organization is affected by this event, and the issue may impact some users set up as a call queue agent. https://status.dal.ca/service.php?Service=8 2025-04-07 08:34:48 Issues affecting MS Defender for Endpoint and the Resiliant File System have been corrected. https://status.dal.ca/service.php?Service=36 2025-04-02 09:17:03 Service Restored https://status.dal.ca/service.php?Service=21 2025-04-02 09:12:38 SharePoint Online pages may be failing to generate web part thumbnails. Impacted web parts include, but aren't limited to:

- Hero
- News
- Quick links
- Highlighted content https://status.dal.ca/service.php?Service=36 2025-04-01 14:31:38 CHANGE CONTROL NOTICE

Type Of Work: Emergency

Customer: ACORN NS

Change Control ID : 1996119

Start Date (yyyy-mm-dd): 2025-04-02
End Date (yyyy-mm-dd): 2025-04-02

Location Of Work: Sutherlands River, NS

Reason For Work: Damaged Fibre

Release Window (24 hr format): 00:00 - 05:00 Atlantic

Affected Circuits:
00142075 - ACORN NS - acorn-nwgl-1 Twe1/0/23 <> acorn-sydn-2
00117880 - acorn-nwgl-1 Twe1/0/13 <> ns-stfx-br001 Te0/0/0/3
00117880 - ST FX ACEnet - 2329 Notre Dame Ave, Antigonish, NS
00119760 - St. Martha's Hosp - 25 Bay Str, Antigonish, NS
00117205 - NSCC STRAIT - 226 Reeves St, Port Hawkesbury, NS

Service Interruption Duration: 3 hours

Service Impact:
Your services will be impacted while we do emergency fibre repair work. https://status.dal.ca/service.php?Service=39 2025-04-01 14:34:36 TEAMS NOTICE
Some users' time zone and work hours may not be appearing on their profile card in the Teams
Service Degradation

More info: Instead of seeing their actual hours with their time zone, users may be presented with a placeholder style "HH:00" input in the field.
Impact is specific to users that leverage non-English languages.
Current status: The service provider expects the deployment of the fix to complete by Monday, April 21, 2025, and they're reviewing options to expedite the completion of the deployment https://status.dal.ca/service.php?Service=37 2025-04-01 14:29:49 Service Restored https://status.dal.ca/service.php?Service=38 2025-04-01 10:05:42 M365 NOTICE
Users in Paraguay may see an incorrect time in multiple M365 apps and services
Service Degradation

More info: Affected Office 365 web apps may include the following:
- Outlook on the web
- Teams web client
- SharePoint Online web client
- Word web client
- Myaccount.microsoft.com
While the service provider works to resolve impact, affected users can set their time zone to (UTC-03:00) Brasilia to bypass impact. Listed below is documentation on how to change your time zone in M365:
https://support.microsoft.com/en-us/topic/change-your-display-language-and-time-zone-in-microsoft-365-for-business-6f238bff-5252-441e-b32b-655d5d85d15b

Current status: The service provider has determined that a nation-wide decision regarding the time zone was implemented and the patch to accommodate this change, while being deployed, hasn’t completed its deployment to align with this change. They’re monitoring the ongoing deployment of the patch to address this issue and expect that it should complete to resolve this problem by their next update. https://status.dal.ca/service.php?Service=38 2025-04-01 10:07:22 M365 NOTICE
Some users may have been unable to create, update, cancel, RSVP and forward meetings in Teams
Service Restored

More info: Affected users may have also been unable to access their Exchange Online mailbox via any connection method.
Final status: The service provider has reverted the change and confirmed after monitoring that impact has been remediated.
Scope of impact: Impact was specific to some users who were served through the affected infrastructure in the United Kingdom.
Start time: Tuesday, April 1, 2025, at 3:47 AM AST
End time: Tuesday, April 1, 2025, at 7:00 AM AST https://status.dal.ca/service.php?Service=37 2025-03-28 14:40:40 CHANGE NOTICE
Maintenance - Scheduled - Major
Start Date: Mar 31, 2025 10:00 PM AST
End Date: Apr 01, 2025 10:00 AM AST
Cause: Upgrade - Software

Service Outage Details
During this time, service interruptions may occur to PTT Dispatch Console. Active PTT sessions may experience drops.

Impacted Services
Push to Talk https://status.dal.ca/service.php?Service=6 2025-03-31 09:48:35 EXCHANGE NOTICE
Some users can't view or access some public folders within the Outlook desktop client and Outlook on the web
Service Degradation

More info: Additionally, affected users may be unable to create new or delete some existing public folders within the Outlook desktop client and Outlook on the web.
Current status: The service provider is manually restarting the affected infrastructure and continuing to work through their hierarchy sync logs to confirm if disabling the aforementioned change has taken effect, in order to validate their hypothesis of the underlying root cause. https://status.dal.ca/service.php?Service=38 2025-03-31 14:44:06 M365 NOTICE
Users were unable to use eDiscovery services and features
Service Restored

More info: All users were unable to export search results, or items from a review through eDiscovery. Case creation, content search, evaluating and refining search results, and using review sets to manage content were not impacted by this event.
Additionally, existing eDiscovery holds were not impacted by this event and continued to preserve content as configured. However, creating new eDiscovery holds during the impact duration may have failed to complete.
Final Status: The service provider has completed their extended monitoring of the service and validated through customer reports and service telemetry signals that the issue has been resolved.

Start time: Tuesday, March 25, 2025, at 2:45 PM AST
End time: Saturday, March 29, 2025, at 6:15 AM AST https://status.dal.ca/service.php?Service=6 2025-03-31 09:37:59 EXCHANGE NOTICE
Users may be unable to view email content when opening PDF attachments in shared mailboxes in Outlook on the web
Service Restored

More info: Users may have seen the following error message when attempting to open PDF attachments in Outlook on the web, "Your message can't be displayed right now."
Final status: The service provider has validated that the aforementioned fix has saturated throughout the affected infrastructure and remediated the issue.
Start time: Tuesday, February 11, 2025, at 12:00 PM AST
End time: Thursday, March 27, 2025, at 9:00 PM AST https://status.dal.ca/service.php?Service=39 2025-03-31 09:41:54 TEAMS NOTICE
Users may be unable to upload background images larger than 1800x1800 during Microsoft Teams meetings
Service Degradation

More info: When attempting to upload a background image larger than 1800x1800, users receive an error message stating ""invalid image size" and the upload fails.
Current status: The service provider's fix to revert the strict size check logic has been validated and they're expecting deployment to start by Monday, March 31, 2025. https://status.dal.ca/service.php?Service=39 2025-03-31 09:41:08 Status
Service Degradation

Impacted services
Microsoft Teams

Title: Users are experiencing failures when attempting to join channel meetings in Microsoft Teams

User impact: Users are experiencing failures when attempting to join channel meetings.

More info: Impact is specific to users on the desktop client or web app that are joining channel meetings from the new calendar experience, or users being nudged into these channel meetings.
Users aren't seeing an error, the action simply fails.
While we're working to remediate impact, affected users can still join channel meetings using the classic Teams calendar or the Teams mobile apps.
Current status: Our monitoring has identified an increase in join failures for channel meetings in Microsoft Teams. We've reviewed recent service updates and identified that a code regression is resulting in impact. We're in the process of validating a fix to remediate this issue.
Scope of impact: Your organization is affected by this event, and any user attempting to join Microsoft Teams channel meetings using the new calendar experience or nudge from the Microsoft Teams desktop and web clients is impacted.
Start time: Wednesday, March 5, 2025, at 12:00 PM UTC
Root cause: A recent update contains a code regression, resulting in impact.
Next update by: Thursday, March 20, 2025, at 9:00 PM UTC https://status.dal.ca/service.php?Service=39 2025-03-31 09:43:49 TEAMS NOTICE
Users' Notes tabs in Teams channels may not open the OneNote notebook or direct to the incorrect section
Service Restored

More info: When users click on the Notes tab in a Teams channel, they may have received an error that states: "There was a problem reaching this app." When users retry, they may have been redirected to an unexpected location within the OneNote notebook they’re accessing.
Final status: The deployment has completed and the service provider has confirmed through monitoring service health telemetry that the impact has been remediated.
Start time: Friday, March 21, 2025, at 11:08 AM AST
End time: Saturday, March 29, 2025, at 1:08 PM AST https://status.dal.ca/service.php?Service=9 2025-03-28 11:25:00 Please be advised that there will be scheduled network maintenance on Sunday, March 30th, at 6:00 AM. During this time, there may be an outage at the Truro campus. We apologize for any inconvenience this may cause and appreciate your understanding. https://status.dal.ca/service.php?Service=36 2025-03-28 09:16:08 CHANGE CONTROL NOTICE
Service Restored https://status.dal.ca/service.php?Service=36 2025-03-26 15:13:52 Eastlink New Change Control Notice


Type Of Work: Emergency

Customer: Canary NOC

Change Control ID : 1993312

Start Date (yyyy-mm-dd): 2025-03-28

End Date (yyyy-mm-dd): 2025-03-28

Country: Canada

Location Of Work: Charlottetown - PE

Reason For Work: Failing Card

Release Window (24 hr format): 00:00 - 02:00 Atlantic

Affected Circuits:
00144649 - DAL's Canarie 10Gig - Charlottetown to St John's UPEI Vet College

Service Interruption Duration: less than 20 minute

Service Impact:
Your services will be impacted while we do emergency replacement of a failing equipment. https://status.dal.ca/service.php?Service=17 2025-04-04 10:12:05 Killam 3rd floor: Network restored https://status.dal.ca/service.php?Service=39 2025-03-27 10:24:30 TEAMS NOTICE
Users may see their camera self-view presenting upside-down in Teams meetings using some iPad OS devices
Service Restored

More info: This issue specifically affected iPad OS devices that were released in 2025 and are leveraging iPad OS version 18.3.0 or later. Other devices, including other iPad OS devices, weren't impacted.
Final status: The service provider's investigation has determined that a recent change to the API responsible for facilitating the camera signal in Teams meetings introduced a compatibility issue that prevented the service from orienting the incoming camera signal correctly, leading to impact. They've developed and deployed a fix to restore compatibility with this API and repair the issue, and they've monitored their service health telemetry to confirm that the previously affected self-views are now oriented correctly and impact is remediated. They recommend that any user still seeing the impact restart their Teams app on the affected device to ensure they've received the fix.
Start time: Wednesday, March 12, 2025, at 3:00 AM AST
End time: Wednesday, March 26, 2025, at 3:58 PM AST https://status.dal.ca/service.php?Service=6 2025-03-26 15:28:52 Status
Service Degradation
EX1041375

Details

Title: Users may be unable to view email content when opening PDF attachments in shared mailboxes in Outlook on the web

User impact: Users may be unable to view email content when opening PDF attachments in shared mailboxes in Outlook on the web.

More info: Users see the following error message when attempting to open PDF attachments in Outlook on the web, "Your message can't be displayed right now."
Users can open PDF attachments in other Exchange Online clients to avoid the issue.

Current status: We suspect this issue is impacting any user with specific layout settings. Specifically, users that have their layout settings set to Text Size and Spacing "small", and the Message Organization set to "group messages by conversation" and "all messages from the selected conversation" to be visible in the reading pane. We’re working with some affected users to confirm our findings and determine whether a fix that’s already been developed to address this problem will fully resolve the issue.

Scope of impact: Any user trying to open PDF attachments in any shared mailbox in Outlook on the web may be impacted.
Next update by: Thursday, March 27, 2025, at 3:00 PM UTC https://status.dal.ca/service.php?Service=6 2025-03-27 10:21:08 EXCHANGE NOTICE
Some users are receiving a misleading error when replying to or forwarding email through Outlook on the web
Service Restored

More info: The error was misleading and didn't prevent users from replying to or forwarding email through Outlook on the web.
Final status: The service provider has confirmed with affected users that their fix deployment has resolved the issue. Previously affected users may need to restart Outlook on the web to ensure that the fix has been implemented.
Start time: Wednesday, February 19, 2025, at 12:26 AM AST
End time: Monday, March 24, 2025, at 12:54 PM AST https://status.dal.ca/service.php?Service=8 2025-03-26 08:43:41 Users may experience crashes on Resilient File System (ReFS) enabled devices in Microsoft Defender

Issue ID: DZ1041341
Affected services: Microsoft Defender XDR
Status: Service degradation
Issue type: Advisory
Start time: Mar 11, 2025, 4:00 AM ADT

User impact
Users may experience crashes on ReFS enabled devices in Microsoft Defender.

More info
This impact is sporadic and may be causing a system failure on ReFS enabled devices on the latest update.

To resolve impact in the meantime, we recommend for all devices with ReFS enabled, to revert back to the previous update, and not utilize the KB5053602 or KB5053603 updates.

Scope of impact
Any user may be affected by this event and experience crashes on ReFS enabled devices.

Root cause
A recent update to the Microsoft Defender for Endpoint service contained a code issue that affects ReFS enabled devices, leading to impact.


Current status
Mar 25, 2025, 10:48 PM ADT
We were alerted to this issue internally and upon investigation, we identified a recent update to the Microsoft Defender for Endpoint service contained a code issue that affects ReFS enabled devices, leading to impact. We recommend any users with ReFS enabled to not download the affected KB5053602 or KB5053603 updates, and revert back to the previous update version. In addition, we're working on a code change to help dramatically lower the occurrence of this issue while we also work on a long-term fix solution set to release in the next major update.

Next update by:
Thursday, March 27, 2025 at 12:30 AM ADT https://status.dal.ca/service.php?Service=6 2025-03-25 11:56:21 EXCHANGE NOTICE
Some users are receiving a misleading error when replying to or forwarding email through Outlook on the web
Service Degradation

More info: The error is misleading and doesn't prevent users from replying to or forwarding email through Outlook on the web.
Affected users are seeing the following error message:

"This message can't be saved right now. Please try again later."

Current status: The service provider's additional analysis into the aforementioned error has helped us isolate a code regression that was introduced by an update to help improve service performance. They highly suspect this regression is producing errors for users when replying to or forwarding email through Outlook on the web. They're deploying a fix to address the isolated code regression and have post deployment testing scheduled with affected users to help us confirm if impact has been remediated. https://status.dal.ca/service.php?Service=38 2025-03-25 10:24:02 M365 NOTICE
Some users may be unable to search or see recommendations in multiple M365 services
Service Restored

More info: Impacted services included but weren't limited to:
- Outlook on the web and desktop client
- Teams
- OneDrive for Business
- SharePoint Online
Final status: The service provider has confirmed through their deployment telemetry that the fix has reached all remaining affected users and the impact is remediated.
Start time: Monday, March 10, 2025, at 4:00 AM AST
End time: Friday, March 21, 2025, at 2:00 PM AST https://status.dal.ca/service.php?Service=6 2025-03-25 10:17:12 EXCHANGE NOTICE
Some users may encounter Non-Delivery Report (NDR) failures when sending or receiving email messages
Service Restored

More info: Users may have received an NDR containing an error stating "554 5.6.0 Corrupt message content".
Additionally, users may have intermittently received calendar invite email messages as a plain text message containing winmail.dat attachments.
Users may have been able to send affected messages by attempting to resend.
Final status: The service provider has completed their work to replay affected email messages and confirmed through service telemetry that NDR failure rates have returned to pre-incident thresholds; the service is maintaining a 99.99 percent success rate.
Start time: Sunday, March 9, 2025, at 8:07 PM AST
End time: Monday, March 24, 2025, at 3:06 PM AST https://status.dal.ca/service.php?Service=21 2025-03-25 08:46:25 Resolved:

1) Users may have been unable to search or see recommendations in myDal/SharePoint or OneDrive. https://status.dal.ca/service.php?Service=21 2025-03-24 15:54:22 Active:

1) Users may be unable to search or see recommendations in myDal/SharePoint or OneDrive.

Resolved:

1) Users' myDal/SharePoint column filter is not working as expected. When filling out the list/library column filter text box after typing the first letter the first matching term automatically auto-fills, requiring the users to delete the auto-fill if they want to select another term. It also affects Managed Metadata/Taxonomy columns. https://status.dal.ca/service.php?Service=39 2025-03-24 15:14:23 TEAMS NOTICE
Users may be unable to place calls or join meetings in Teams web client.
Service Restored

Following the service provider's extended service monitoring, their internal service telemetry has verified that users restarting their Teams clients has successfully remediated the impact.

Start time: Wednesday, March 19, 2025, at 2:02 PM AST
End time: Friday, March 21, 2025, at 8:40 PM AST https://status.dal.ca/service.php?Service=39 2025-03-24 15:12:56 TEAMS NOTICE
Users may be unable to place calls or join meetings in Teams web client.
Service degradation

More info: As a workaround, affected users can restart their browser and log back in to resolve the issue.
Current status: The service provider suspects a recent change is resulting in the impact, and they're reviewing their options to determine the best path towards mitigation. https://status.dal.ca/service.php?Service=6 2025-03-24 09:45:49 EXCHANGE NOTICE
Some users' Exchange Online email messages may be unexpectedly quarantined
Service Restored

Final status: The service provider has manually reallocated the remainder of the affected messages and confirmed that this issue is resolved.
Scope of impact: Impact was specific to some users who were served through the affected infrastructure.
Start time: Thursday, March 20, 2025, at 7:40 PM AST
End time: Friday, March 21, 2025, at 5:35 PM AST https://status.dal.ca/service.php?Service=17 2025-03-24 08:55:21 Killam 3rd floor closed for power renovation https://status.dal.ca/service.php?Service=9 2025-03-24 08:54:55 Killam 3rd floor closed for power renovation https://status.dal.ca/service.php?Service=43 2025-03-24 08:29:41 Note: Microsoft reported and resolved a recent issue where users may have experienced intermittent failures running Power Automate flows or playing Power App apps that use the Office 365 Outlook connector. Users may wish to check their flow or app run history for further details. https://status.dal.ca/service.php?Service=37 2025-03-26 08:43:03 Maintenance on PTT services completed successfully. https://status.dal.ca/service.php?Service=37 2025-03-18 10:48:37 Ticket ID: 21058 (Maintenance - Scheduled - Medium)
Start Date: Mar 21, 2025 12:00 AM EST
End Date: Mar 21, 2025 07:00 AM EST
Cause: Upgrade - Software

Service Outage Details
During this time, service interruptions may occur. Active PTT sessions may experience drops, new sessions can be initiated after 30 seconds.

Impacted Services
Push to Talk

Impacted Locations / Sites
Canada https://status.dal.ca/service.php?Service=36 2025-03-21 10:18:25 CHANGE CONTROL NOTICE
Service Restored https://status.dal.ca/service.php?Service=6 2025-03-21 09:15:50 Some users' Exchange Online email messages may be unexpectedly quarantined

Issue ID: EX1038119
Affected services: Exchange Online
Status: Service degradation
Issue type: Incident
Start time: Mar 21, 2025, 7:11 AM ADT

User impact
Users' Exchange Online email messages may be unexpectedly quarantined.

Scope of impact
Impact is specific to some users who are served through the affected infrastructure.


Current status:
Mar 21, 2025, 7:12 AM ADT
We're analyzing trends in diagnostic telemetry to correlate specific affected URLs and determine our next troubleshooting steps.

Next update by:
Friday, March 21, 2025 at 9:30 AM ADT https://status.dal.ca/service.php?Service=39 2025-03-21 10:14:54 TEAMS NOTICE
Some users' apps, such as the Calendar and OneDrive, aren't appearing in the Teams sidebar
Service Restored

User impact: Users' apps, such as the Calendar and OneDrive, weren't appearing in the Teams sidebar.
Final status: The service provider has completed restarting the cache of users on affected portions of Teams service infrastructure and received confirmation from some users who initially reported the issue that the impact is remediated.
Start time: Tuesday, March 18, 2025, at 3:14 PM AST
End time: Thursday, March 20, 2025, at 5:07 PM AST https://status.dal.ca/service.php?Service=21 2025-03-21 08:21:55 Active Issues:

1) Users' SharePoint Online column filter is not working as expected. When filling out the list/library column filter text box after typing the first letter the first matching term automatically auto-fills, requiring the users to delete the auto-fill if they want to select another term. It also affects Managed Metadata / Taxonomy columns.

2) Users may be unable to search or see recommendations in SharePoint or OneDrive. https://status.dal.ca/service.php?Service=39 2025-03-21 09:53:21 TEAMS NOTICE
Title: Some users may be unable to see the Calendar icon in the Teams sidebar
Service Degradation

More info: Affected users can clear their Teams cache to restore the Calendar icon to the Teams sidebar.
Current status: We're reviewing reproductions of the problem along with client and web logs to better understand the underlying impact scenario. Simultaneously, we're reaching out to a subset of affected users to validate if additional icons may be missing from the Microsoft Teams sidebar.
Scope of impact: Users who are processed through the affected portions of Microsoft Teams service infrastructure may be unable to see the Calendar icon in the Microsoft Teams sidebar.
Next update by: Thursday, March 20, 2025, at 5:30 PM UTC https://status.dal.ca/service.php?Service=36 2025-03-04 11:15:47 CHANGE CONTROL NOTICE

Type Of Work: Maintenance

Customer: Canary NOC

Change Control ID : 1974418

Start Date (yyyy-mm-dd): 2025-03-21
End Date (yyyy-mm-dd): 2025-03-21

Country: Canada

Location Of Work: Dartmouth - NS

Reason For Work: Network Testing/Maintenance

Release Window (24 hr format): 00:00 - 06:00 Atlantic

Affected Circuits:
00152705 - Fundy Web Canarie 10Gig - 228 Elizabeth Ave, St John's, NL <> 6225 University Ave, Halifax, NS

Service Interruption Duration: 2 hours

Service Impact:
Your services will be impacted while we troubleshoot issues on a DWDM Fiber span. https://status.dal.ca/service.php?Service=6 2025-03-20 10:08:41 Status
Service Restored

Impacted services
Exchange Online

Title: Some users may be unable to search in Exchange Online using Outlook on the web or the new Outlook client
User impact: Users may be unable to search in Exchange Online using Outlook on the web or the new Outlook client.
More info: Affected users may have seen the following error message "We didn't find anything, try a different keyword" when performing searches in Exchange Online.
As a workaround, users may have been able to yield results using a filter in their search criteria i.e. 'Inbox' under folder names, in addition to a string query.
Final status: After validating with a subset of affected users, we've confirmed that impact is resolved. For affected users that are still experiencing search failures, restarting or refreshing Outlook on the web or the new Outlook client will resolve any lingering search issues.
Scope of impact: Impact was specific to some users, who were served through the affected infrastructure, attempting to search in Exchange Online.
Start time: Tuesday, March 18, 2025, at 2:00 AM UTC
End time: Wednesday, March 19, 2025, at 8:05 PM UTC
Root cause: A recent Exchange Online update introduced a code error, which caused some users to been unable to search in Exchange Online using Outlook on the web or the new Outlook client.
Next steps:
- We're continuing to analyze and evaluate the affected Exchange Online update that introduced the code error to understand why impact wasn't caught during the update testing and validation phase. This will help to prevent similar impact from occurring in future and to continue our ongoing efforts to improve the resiliency of our service for all users.
This is the final update for the event. https://status.dal.ca/service.php?Service=6 2025-03-20 09:59:17 Status
Service Restored

Impacted services
Exchange Online

Title: Some users may be unable to access Outlook on the web
User impact: Users may have been unable to access Outlook on the web.
More info: Impacted users may have experienced a "Something went wrong" error message.
Final status: We've successfully reverted the problematic code change and verified the issue has been remediated through customer confirmation and service health telemetry.
Scope of impact: Any user routed through the affected infrastructure attempting to access Outlook on the web may have been impacted.
Start time: Wednesday, March 19, 2025, at 4:51 PM UTC
End time: Wednesday, March 19, 2025, at 6:55 PM UTC
Preliminary root cause: A recent configuration change intended to improve the use of browser content policies within Outlook on the web, introduced a code regression resulting in impact.
Next steps:
- We're assessing our service monitoring of this impact scenario to implement improvements for detecting similar events and reduce our time to identify, mitigate, or prevent this type of impact.
We'll provide a preliminary Post-Incident Report within two business days and a final Post-Incident Report within five business days. https://status.dal.ca/service.php?Service=6 2025-03-20 09:56:11 Status
Service Degradation

Impacted services
Exchange Online

Title: Some users may be unable to access Outlook on the web
User impact: Users may be unable to access Outlook on the web.
More info: Impacted users may experience a "Something went wrong" error message.
Current status: We've reproduced the issue and gathered diagnostic data for analysis into the underlying root cause.
Scope of impact: Any user attempting to access Outlook on the web may be impacted.
Next update by: Wednesday, March 19, 2025, at 7:30 PM UTC https://status.dal.ca/service.php?Service=37 2025-03-18 10:46:50 Ticket ID: 21057 (Maintenance - Scheduled - Medium)
Start Date: Mar 19, 2025 10:00 PM EST
End Date: Mar 20, 2025 07:00 AM EST
Cause: Upgrade - Software

Service Outage Details
During this time, service interruptions may occur. Active PTT sessions may experience drops, new sessions can be initiated after 30 seconds.

Impacted Services
Push to Talk

Impacted Locations / Sites
Canada https://status.dal.ca/service.php?Service=6 2025-03-19 14:36:36 Status
Service Restored

Impacted services
Exchange Online

Title: Users with apostrophes in their surname in Exchange Online may be unable to search for other users
User impact: Users with apostrophes in their surname in Exchange Online were unable to search for other users.
Final status: We've completed deployment of our solution throughout the affected environments, and after monitoring the service, we've verified that this action has successfully remediated the problem.
Scope of impact: This issue may have impacted any user with an apostrophe in their surname in Exchange Online that was searching for other users.
Start time: Wednesday, February 5, 2025, at 4:50 PM UTC
End time: Tuesday, March 18, 2025, at 7:00 PM UTC
Root cause: The URL utilized by the Outlook service when performing searches was malformed due to the code not providing the full email address of users with apostrophes in their address when submitting the request.
Next steps:
- We're investigating why the URL used by the Outlook service for searches was malformed to help us avoid similar impact in the future.
This is the final update for the event. https://status.dal.ca/service.php?Service=37 2025-03-18 10:44:51 Ticket ID: 21056 (Maintenance - Scheduled - Medium)
Start Date: Mar 19, 2025 12:00 AM EST
End Date: Mar 19, 2025 07:00 AM EST
Cause: Upgrade - Software

Service Outage Details
During this time, PTT users should not experience any service impact. However, service interruptions may occur in an unanticipated condition.

Impacted Services
Push to Talk

Impacted Locations / Sites
Canada https://status.dal.ca/service.php?Service=37 2025-03-14 16:24:00 Ticket ID: 21054 (Maintenance - Scheduled - Major)
Start Date: Mar 19, 2025 11:00 AM EST
End Date: Mar 20, 2025 06:00 AM EST
Cause: Hardware - Software upgrade

Service Outage Details
Service interruptions may occur. Active PTT sessions may experience drops, new sessions can be initiated after 30 seconds.

Impacted Services
Push to Talk

Impacted Locations / Sites
Canada https://status.dal.ca/service.php?Service=39 2025-03-19 10:38:09 Status
Service Restored

Impacted services
Microsoft Teams

Title: Some users may receive a cancellation email when the attendees list is edited for existing town hall meetings
User impact: Users may have received a cancellation email when the attendees list was edited for existing town hall meetings
More info: To bypass the issue, meeting organizers should have avoided making edits that only change the co-organizers, presenters, or attendees. Making other edits in addition to edits to these categories may have allowed meeting organizers to avoid the impact.
The town hall meetings weren’t canceled and users who received this email could still attend the meeting as expected using the previously provided details.
Final status: Our deployment to revert the recent update has completed across all impacted infrastructure. After a period of internal service monitoring, we've confirmed that user impact is resolved.
Scope of impact: Some users who were added as attendees to Microsoft Teams town halls and had previously accepted the invitation may have been impacted.
Start time: Wednesday, January 15, 2025, at 5:00 PM UTC
End time: Tuesday, March 18, 2025, at 6:50 PM UTC
Root cause: A service change, meant to improve the editing experience for meeting invites by ensuring that only added or removed attendees receive notifications of the change to their email, was causing impact.
Next steps:
- We're continuing to analyze and review the affecting service change to better understand why impact wasn’t caught during the testing and validation phase. This is to ensure that similar impact doesn’t occur again and to continue our ongoing efforts to improve the resiliency of our service for all users.
This is the final update for the event. https://status.dal.ca/service.php?Service=6 2025-03-19 10:33:36 Status
Service Degradation

Impacted services
Exchange Online

Title: Some users are unable to search in Outlook on the web and receive an error message

User impact: Users are unable to search in Outlook on the web and receive an error message.

More info: Impacted users receive the following error message "We didn't find anything, try different keyword" when performing searches in Outlook on the web.
Current status: We're analyzing HTTP Archive format (HAR) logs and recordings provided in the support case to determine our next troubleshooting steps.
Scope of impact: Impact is specific to some users who are served through the affected infrastructure.
Next update by: Wednesday, March 19, 2025, at 9:30 AM UTC https://status.dal.ca/service.php?Service=6 2025-03-18 10:37:58 Status
Investigation Suspended

Impacted services
Exchange Online

Title: Users may be experiencing issues with accessing email messages on the iOS native mail app

User impact: Users may have been experiencing issues with accessing email messages on the iOS native mail app.

More info: Users may have been able to click "continue" when prompted and navigate back to re-entering their password to attempt to resolve impact. If users weren't prompted but were still experiencing impact, they may have followed the steps in the following link:
https://support.microsoft.com/en-us/office/reconnecting-your-microsoft-365-account-to-apple-mail-83df246e-34d2-4dbb-8e37-23a90c13e16e
The problem was specific to the native mail app on iOS devices. Microsoft Outlook for mobile was not affected and could have been used without issue.
Impacted users were encouraged to file a support ticket with Apple to provide valuable logging information to assist with our continued joint investigation with Apple into the source of impact.
Final status: We've confirmed after monitoring service health telemetry that errors associated with impact have reduced to pre-impact thresholds as of Saturday, March 15, 2025, at 2:00 PM UTC. This confirms that the majority of users are no longer affected by this event and that additional remediation efforts within the Microsoft-managed environment aren't required. As previously mentioned, users whose impact persists should follow the steps outlined in the "More info" of this communication to remediate impact.
Scope of impact: Some users accessing their email from the native iOS email app may have been affected.
Start time: Monday, March 3, 2025, at 12:10 AM UTC
Next steps:
- We’ll continue partnering with Apple to gain root cause insights, though this is a best-effort as the underlying issue didn’t reside within the Microsoft-managed environment.
- Follow the steps outlined in the “More info” of this communication in the event you’re still affected.
This is the final update for the event. https://status.dal.ca/service.php?Service=6 2025-03-18 10:38:19 Status
Investigation Suspended

Impacted services
Exchange Online

Title: Users may be experiencing issues with accessing email messages on the iOS native mail app

User impact: Users may have been experiencing issues with accessing email messages on the iOS native mail app.

More info: Users may have been able to click "continue" when prompted and navigate back to re-entering their password to attempt to resolve impact. If users weren't prompted but were still experiencing impact, they may have followed the steps in the following link:
https://support.microsoft.com/en-us/office/reconnecting-your-microsoft-365-account-to-apple-mail-83df246e-34d2-4dbb-8e37-23a90c13e16e
The problem was specific to the native mail app on iOS devices. Microsoft Outlook for mobile was not affected and could have been used without issue.
Impacted users were encouraged to file a support ticket with Apple to provide valuable logging information to assist with our continued joint investigation with Apple into the source of impact.
Final status: We've confirmed after monitoring service health telemetry that errors associated with impact have reduced to pre-impact thresholds as of Saturday, March 15, 2025, at 2:00 PM UTC. This confirms that the majority of users are no longer affected by this event and that additional remediation efforts within the Microsoft-managed environment aren't required. As previously mentioned, users whose impact persists should follow the steps outlined in the "More info" of this communication to remediate impact.
Scope of impact: Some users accessing their email from the native iOS email app may have been affected.
Start time: Monday, March 3, 2025, at 12:10 AM UTC
Next steps:
- We’ll continue partnering with Apple to gain root cause insights, though this is a best-effort as the underlying issue didn’t reside within the Microsoft-managed environment.
- Follow the steps outlined in the “More info” of this communication in the event you’re still affected.
This is the final update for the event. https://status.dal.ca/service.php?Service=37 2025-03-18 10:42:48 Ticket ID: 21055 (Maintenance - Scheduled - Medium)
Start Date: Mar 17, 2025 10:00 PM EST
End Date: Mar 18, 2025 07:00 AM EST
Cause: Upgrade - Software
Service Outage Details
During this time, PTT users should not experience any service impact. However, service interruptions may occur in an unanticipated condition.

Impacted Services
Push to Talk

Impacted Locations / Sites
Canada https://status.dal.ca/service.php?Service=43 2025-03-17 15:13:59 Microsoft resolved an issue where users may have experienced failures when attempting to use a subset of Power Platform connectors:
- office365users
- excelonlinebusiness
- sharepointonline
- filesystem
- keyvault
- office365
- commondataservice
- azureblob
- sql
- conversionservice https://status.dal.ca/service.php?Service=37 2025-03-14 16:22:11 Ticket ID: 21053 (Maintenance - Scheduled - Major)
Start Date: Mar 17, 2025 11:00 PM EST
End Date: Mar 18, 2025 06:00 AM EST
Cause: Hardware - Software upgrade

Service Outage Details
Service interruptions may occur. Active PTT sessions may experience drops, new sessions can be initiated after 30 seconds.

Impacted Services
Push to Talk

Impacted Locations / Sites
Canada https://status.dal.ca/service.php?Service=36 2025-03-17 09:33:03 Completed https://status.dal.ca/service.php?Service=6 2025-03-14 10:30:57 Status
Service Degradation

Impacted services
Exchange Online

Title: Some users may encounter Non-Delivery Report (NDR) failures when sending or receiving email messages

User impact: Some users may encounter NDR failures when sending or receiving email messages in Exchange Online.

More info: Users may receive a Non-Delivery Report (NDR) containing an error stating "554 5.6.0 Corrupt message content".
Current status: We've identified that impact is not limited to users sending IRM protected email as we previously communicated. We've updated the title, user impact, more info and scope of impact sections of this communication to reflect that new information. Our previously stated fix will continue deploying to affected infrastructure while we continue monitoring its efficacy as it progresses. Concurrently, we’ve shifted attention to our reproduction efforts and deeper log analysis to further isolate the cause of impact and identify new mitigation strategies.
Scope of impact: Some users serviced by the impacted portion of infrastructure sending or receiving email in Exchange Online may be affected, although impact is limited to a small subset of messages.
Next update by: Friday, March 14, 2025, at 6:30 PM UTC https://status.dal.ca/service.php?Service=6 2025-03-14 10:25:38 Status
Service Restored

Impacted services
Exchange Online

Title: Some users may see add-ins in Outlook desktop and Outlook on the web that aren't installed or removable

User impact: Users may have seen add-ins in Outlook desktop and Outlook on the web that weren't installed or removable.

More info: As a temporary workaround, affected users could have disabled ‘Show Apps in Outlook’ for relief, but this only applied to classic Outlook on Windows. There was no workaround for Outlook on the web, new Outlook on Windows, or Outlook for Mac.
Final status: Following the deployment of our fix, our internal tests and validations from affected users have confirmed that the code problems have been addressed, and that impact has been remediated.
Scope of impact: Some users may have seen add-ins in the Outlook desktop client and Outlook on the web which weren't installed and couldn't be removed.
Start time: Thursday, January 9, 2025, at 8:36 PM UTC
End time: Thursday, March 13, 2025, at 8:15 PM UTC
Root cause: A service update to a portion of service infrastructure that facilitates identification of which add-ins are enabled for users in Outlook on the web and the Outlook desktop client contained an impacting code issue.
Next steps:
- We're further analyzing the offending service update so we can help identify similar issues during our pre-deployment testing and validation processes.
This is the final update for the event. https://status.dal.ca/service.php?Service=38 2025-03-14 10:22:28 Status
Service Restored

Impacted services
Microsoft 365 suite

Title: Users may be unable to load Office Scripts in Excel or Excel for the web

User impact: Users may have been unable to load Office Scripts in Excel or Excel for the web.

More info: Users encountering this issue may have seen an error that stated, "Office Scripts service is unreachable. Please check network and firewall settings."
Final status: We've disabled the update deployment, which was a feature for security improvements that we identified had adversely affected the backing service for Office Scripts, and confirmed through telemetry and testing that this has resolved the impact.
Scope of impact: This may have affected users served through East US, West US, North Europe, West Europe, and Southeast Asia.
Start time: Thursday, March 13, 2025, at 5:30 PM UTC
End time: Thursday, March 13, 2025, at 8:33 PM UTC
Root cause: A feature update to improve Office Scripts security, which was in the process of rolling out, had caused an adverse response for Office Scripts scenarios.
Next steps:
- We're continuing to review the security feature in conjunction with the impact it introduced to Office Scripts to improve our understanding of how it led to this problem. Based on our findings we'll implement additional testing and validation measures in future feature deployments to prevent similar impact from reoccurring.
This is the final update for the event. https://status.dal.ca/service.php?Service=38 2025-03-14 10:20:15 Status
Service Degradation

Impacted services
Microsoft 365 suite

Title: Users may be unable to load Office Scripts in Excel or Excel for the web

User impact: Users may be unable to load Office Scripts in Excel or Excel for the web.

More info: Users encountering this issue may see an error that states, "Office Scripts service is unreachable. Please check network and firewall settings."
Current status: We're seeing an increase in errors and a drop in traffic for the Office Scripts service that correlate with the reports of impact. We're proactively taking steps to disable a recent update to assess if that helps to address the issue while reviewing available data to understand the underlying cause of the impact.
Scope of impact: This may affect users served through East US, West US, North Europe, West Europe, and Southeast Asia may be affected.
Next update by: Thursday, March 13, 2025, at 9:30 PM UTC https://status.dal.ca/service.php?Service=6 2025-03-14 10:17:14 Status
Service Restored

Impacted services
Exchange Online

Title: Users may encounter delays or failures when sending or receiving email messages in Exchange Online

User impact: Users may have encountered delays or failures when sending or receiving email messages in Exchange Online.

Final status: We've identified that the remaining impact relates to a separate issue which exhibits a nearly identical impact to users. We've confirmed that our fix completed in the affected environment and impact for this issue is remediated based on our internal monitoring. We'll continue investigating the root cause of the remaining impact and supplying further updates in EX1030895.
Scope of impact: Any user serviced by the impacted portion of infrastructure sending or receiving some email in Exchange Online may have been affected.
Start time: Friday, March 7, 2025, at 5:30 PM UTC
End time: Thursday, March 13, 2025, at 5:00 PM UTC
Root cause: A recent service update, intended to improve our message transport services, introduced a code issue that resulted in impact for a portion of service infrastructure.
Next steps:
- We're reviewing our service update validation procedures to detect and prevent similar issues from occurring in the future.
This is the final update for the event. https://status.dal.ca/service.php?Service=6 2025-03-13 14:17:02 Status
Service Degradation

Impacted services
Exchange Online

Title: Users may encounter delays or failures when sending or receiving email messages in Exchange Online

User impact: Users may encounter delays or failures when sending or receiving email messages in Exchange Online.

More info: Users encountering failures when sending email messages receive a Non-Delivery Report (NDR) containing an error stating "554 5.6.0 Corrupt message content".
Additionally, users may be unable to send email messages with attached files in any connection method of Exchange Online. Sending attachments as ZIP files allows the email messages to be delivered as expected, serving as a method by which to bypass the issue while we continue to investigate.
Current status: Though we've deployed the fix to 95 percent of the affected environment, we've received continued reports of impact that indicate our fix may not have corrected this issue as expected. We've halted the fix deployment and are reviewing these reports to determine our next steps.
Scope of impact: Any user serviced by the impacted portion of infrastructure sending or receiving some email in Exchange Online may be affected.
Start time: Friday, March 7, 2025, at 5:30 PM UTC
Root cause: A recent service update, intended to improve our message transport services, introduced a code issue that's resulting in impact for a portion of service infrastructure.
Next update by: Thursday, March 13, 2025, at 6:30 PM UTC https://status.dal.ca/service.php?Service=36 2025-03-13 09:45:05 Eastlink Change Control Completion Notice


Update Information: This work has been rescheduled to 13 March from 26 February, sorry for any inconvenience this may have caused.

Customer: Mi'kmaw Kina'matnewey

Change Control ID : 1961724

Start Date: 2025-03-13

End Date: 2025-03-13

Country: Canada

Location Of Work: Halifax, NS

Reason For Work: Hardware Upgrade

Release Window (24 hr format): 00:00 - 05:00 Atlantic

Affected Circuits:
00143232 - 103-7071 Bayers Rd - LL03, Halifax, NS <> 50 Maillard, Membertou, NS

Service Impact: Your services will be impacted while we do a hardware upgrade.