https://status.dal.ca/ RSS feed of the Dalhousie Status Page updates. en-ca Tue, 23 Dec 2025 05:47:14 America/Halifax Copyright 2017 Dalhousie University. https://status.dal.ca/rss.php https://status.dal.ca/service.php?Service=9 2025-12-18 11:30:22 CHANGE CONTROL NOTICE

Type Of Work: Project

Customer: Dalhousie

Change Control ID : 2113291

Customer Change Ticket # 275538

Start Date (yyyy-mm-dd): 2026-01-29
End Date (yyyy-mm-dd): 2026-01-29

Location Of Work: Cape Ray - NL

Reason For Work: Engineering Project

Release Window (24 hr format): 00:30 - 05:15 AST

Affected Circuits:
00144649 - Dalhousie 10Gig - UPEI Vet College, St John's, NL <> Charlottetown, PE

Service Interruption Duration: 4 hours https://status.dal.ca/service.php?Service=36 2025-12-17 15:08:12 Change Control Notice

Type Of Work: Project

Customer: ACORN NS

Change Control ID : 2153804

Start Date (yyyy-mm-dd): 2026-01-09

End Date (yyyy-mm-dd): 2026-01-09

Location Of Work: Heatherton, NS

Reason For Work: OSP Forced Relocate

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

Affected Circuits:
00142075 - ACORN NS - acorn-nwgl-1 Twe1/0/23 <> acorn-sydn-1 Twe1/0/24

Service Interruption Duration: 3 hours

Service Impact:
Your services will be impacted while we do a forced fibre relocate for HWY 104 twinning project. https://status.dal.ca/service.php?Service=9 2025-12-19 10:14:07 CHANGE CONTROL NOTICE

Type Of Work: Project

Customer: Dalhousie

Change Control ID : 2157056

Start Date (yyyy-mm-dd): 2026-01-08
End Date (yyyy-mm-dd): 2026-01-08

Location Of Work: Halifax - NS

Reason For Work: Software upgrade

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

Affected Circuits:
DAL residence with Internet/Wifi/TV Services

Service Interruption Duration: Two Service impacts of less than 5 minute

Service Impact:
Your services will be impacted while we do a software upgrade. https://status.dal.ca/service.php?Service=39 2025-12-22 11:29:10 TEAMS NOTICE
Users are seeing Teams messaging delays and problems with other service functions
Service Restored

More info: Users may have seen delays with the following actions within any Teams client:
- Loading, creating, and editing chats and channels.
- Sending and editing messages.
- Loading images in chats and channels.
- Initiating and transferring calls.
- Viewing call history.

Final status: The service provider has clarified the affected scenarios and enumerated them in the more info section above. They've continued to observe persistent recovery without any manual intervention required, and they've received confirmation from some previously affected users that this issue is no longer occurring.

Start time: Friday, December 19, 2025, at 4:03 PM AST
End time: Friday, December 19, 2025, at 4:16 PM AST https://status.dal.ca/service.php?Service=39 2025-12-22 09:52:55 TEAMS NOTICE
Users may have seen a message "Classic Teams is no longer available" when opening Teams in web applications
Service Restored

More info: Specifically, when users attempted to open Teams through web apps such as Outlook, OneNote, or SharePoint Online, they may have been redirected and received the following message, "Classic Teams is no longer available". However, users could either click "Use Teams on the web" or directly open the Teams app through their mobile, desktop or web app.

Final status: The service provider has confirmed that a URL mismatch led to Teams launching an outdated web page, which resulted in impact. They've changed the URL destination to the correct web page and confirmed through extensive testing, that impact has been remediated.

Start time: Friday, December 19, 2025, at 7:53 PM AST
End time: Monday, December 22, 2025, at 6:30 AM AST https://status.dal.ca/service.php?Service=39 2025-12-22 09:42:26 TEAMS NOTICE
Some Virtual Desktop Infrastructure (VDI) users were unable to share screen or video during Teams meetings
Service Restored

More info: When users attempted to share their screen or video during Teams meetings when using VDI with Omnissa devices, the participants may have only seen a blank screen.

Start time: Thursday, November 20, 2025, at 7:18 AM AST
End time: Friday, December 19, 2025, at 9:39 PM AST https://status.dal.ca/service.php?Service=17 2025-12-22 08:21:14 Changes to wireless network addressing have been completed.

Access to services via wireless connections will be largely unaffected. There is potential for issues accessing some network attached devices (such as network printers). Such problems should be reported to support@dal.ca.

As a workaround for any issues use Dal VPN or the wired network until configuration of these devices can be modified to allow the new wireless IP range. Those responsible for network devices affected by this change should modify device IP filters to include the wireless address range 172.20.0.0/17

Residence wifi is unaffected (except at Kings).

Wired network is unaffected. https://status.dal.ca/service.php?Service=39 2025-12-19 14:38:16 TEAMS NOTICE
Users may be intermittently unable to place calls using the dial pad from the Teams desktop and web clients
Service Restored

More info: Specifically, affected users were missing the dial pad option in Teams clients, and a subset were unable to receive calls.
Admins could have de-provisioned and re-provisioned phone numbers to resolve the issue. Affected users could restart the Microsoft Teams client to receive an expedited fix.

Final status: The service provider has confirmed the reversion process completed and verified through service monitoring and with affected users that this action successfully remediated the problem.

Scope of impact: Any user attempting to place calls using the dial pad in Teams desktop or web clients was intermittently impacted, and a subset of users were unable to receive calls.

Start time: Monday, December 15, 2025, at 5:00 PM AST
End time: Friday, December 19, 2025, at 1:12 PM AST https://status.dal.ca/service.php?Service=39 2025-12-19 08:56:34 TEAMS NOTICE
Users may be unable to answer PSTN calls from call queues using any Teams client
Service Degradation

More info: Affected users when answering PSTN calls in call queues experience calls that remain stuck in a loading state, preventing connection establishment.
Current status: While the service provider continues to validate with a subset of users to validate if disabling "Sync device buttons" in the Teams settings page resolves the issue, they're simultaneously analyzing the code path utilized when answering PSTN calls from call queues for potential discrepancies that may point to the underlying root cause of impact. https://status.dal.ca/service.php?Service=39 2025-12-19 08:53:36 TEAMS NOTICE
Users may be intermittently unable to place calls using the dial pad from the Teams desktop and web clients
Service Degradation

More info: Specifically, affected users may be missing the dial pad option in the Teams clients, and only a subset of the affected users may be unable to receive calls.
While the service provider is working to remediate impact, they've received reports that admins can de-provision and re-provision the phone numbers for affected users to resolve the issue.

Current status: The service provider's investigation has identified a potential API issue preventing the users' licenses from being read as expected. They're also analyzing recent service updates which may be contributing to impact to further isolate the root cause of impact and develop a remediation strategy.

Scope of impact: Any user attempting to place calls using the dial pad using the Teams desktop or web clients may be intermittently impacted, and a subset of users may be unable to receive calls. https://status.dal.ca/service.php?Service=39 2025-12-18 10:26:17 TEAMS NOTICE
Some guest users may be unable to unmute their mics in recurring Teams meetings when recording is enabled
Service Degradation

More info: This issue is specific to guest users who have joined Teams meetings through the Windows or Mac desktop clients. This issue also impacts guest users when attempting to share their screen or turn on their camera during affected Teams meetings. As a workaround, affected guest users can clear their cache to remove expired authentication components or utilize the Teams web app or mobile app.

Current status: The service provider has developed the fix to address the issue on the Teams desktop client for Mac and are preparing for its deployment to the affected environment. The deployment of the fix is expected to complete in early February 2026. They'll continue monitoring the progress and will provide updates on the status as they become available.

Scope of impact: Some external guest participants attempting to unmute their microphones, share their screen, or use their camera during recurring Teams meetings while recording may be impacted.

Start time: Saturday, November 8, 2025, at 9:00 AM AST https://status.dal.ca/service.php?Service=38 2025-12-18 10:08:00 M365 NOTICE
Users in Japan and China are experiencing access and sign‑in issues with M365 and Copilot
Service Restored

Final status: The service provider has confirmed that the issue has been resolved, and all services are now operating as expected.

Scope of impact: Your organization may have been affected by this event, and some users in Japan, China, and Malaysia who attempted to access M365 services including Copilot may have been impacted.

Start time: Wednesday, December 17, 2025, at 9:00 PM AST
End time: Wednesday, December 17, 2025, at 10:17 PM AST https://status.dal.ca/service.php?Service=38 2025-12-18 09:58:27 EXCEL NOTICE
Users can't open new files in Excel for the web or use the "Create a copy" function
Service Restored

More info: Users likely would have encountered this scenario mostly when attempting to open a new file in Excel on the web from SharePoint Online or OneDrive. Any scenario that included triggering an action to open a new file would have been affected also.
Users opening a file in Excel for the web would have encountered a blank white section where the data was expected to populate and would have seen a message in the bottom-right section indicating that the file was still loading.

Final status: The service provider received reports of an issue in which users couldn't open new files in Excel for the web or use the "Create a copy" function and determined that a recent feature update resulted in malformed URLs in the file path process preventing a core resource that facilitates Excel on the web file loading from completing. They've disabled the portion of this update that resulted in the impact and confirmed through monitoring the log errors associated with the issue are no longer occurring.

Scope of impact: Your organization was affected by this event, and any user attempting to open a new file or use the "Create a copy" save feature in Excel for the web was impacted.

Start time: Wednesday, December 17, 2025, at 12:00 PM AST
End time: Wednesday, December 17, 2025, at 4:00 PM AST https://status.dal.ca/service.php?Service=6 2025-12-17 11:16:24 EXCHANGE NOTICE
Users may have been unable to delete a user from the contact list within Outlook on the web
Service Restored

Final status: The service provider has confirmed that the fix has been fully deployed and that impact is resolved.

Start time: Monday, August 4, 2025, at 2:32 PM AST
End time: Tuesday, December 16, 2025, at 9:00 PM AST https://status.dal.ca/service.php?Service=39 2025-12-17 11:14:03 TEAMS NOTICE
Some users may encounter intermittent failures when attempting to create shared and private channels in Teams
Service Restored

Final status: The service provider has confirmed that their targeted adjustments were successful in resolving the underlying processing delays and verified through internal telemetry that the impacted channel creation scenarios are no longer affected.

Start time: Sunday, December 14, 2025, at 1:00 AM AST
End time: Tuesday, December 16, 2025, at 11:30 PM AST https://status.dal.ca/service.php?Service=32 2025-12-16 12:11:20 Campus Bookings PROD will be unavailable between 12:00-12:10PM today while the server is restarted.

Campus Bookings is facing an ongoing issue with Room booking visibility and the vendor has recommended a full server restart. https://status.dal.ca/service.php?Service=39 2025-12-16 09:21:42 TEAMS NOTICE
Some users may encounter intermittent failures when attempting to create shared and private channels in Teams
Service Degradation

Current status: The service provider has identified through internal monitoring that some users creating channels in Teams may be encountering some intermittent impact. They're proceeding with further investigation to diagnose the underlying source of the issue and determine their options for remediation. https://status.dal.ca/service.php?Service=6 2025-12-16 09:19:42 EXCHANGE NOTICE
Users may be unable to upload attachments from OneDrive in Outlook on the web and the new Outlook desktop app
Service Degradation

More info: When users attempt to upload files from OneDrive, they may receive an error that states: “We couldn’t retrieve the items you requested.” Additionally, the option to edit files in the browser is missing.

Current status: The service provider has isolated that a recent .NET framework update intended to improve performance for users in India introduced a misconfiguration, which is resulting in an extremely large increase in requests from Outlook on the web when retrieving the OneDrive URL. This increase in traffic is resulting in request queuing and timeouts as well as throttling as a service protection measure and causing impact. They've rolled back the update and are deploying a secondary fix to further improve the traffic processing efficiency for this scenario to fully mitigate impact. https://status.dal.ca/service.php?Service=36 2025-12-16 09:17:45 Service Restored https://status.dal.ca/service.php?Service=36 2025-12-11 10:15:59 Emergency Change Control Notice

Type Of Work: Emergency

Customer: ACORN NS

Change Control ID : 2161845

Start Date (yyyy-mm-dd): 2025-12-16

End Date (yyyy-mm-dd): 2025-12-16

Country: Canada

Location Of Work: Halifax - NS

Reason For Work: Emergency

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

Affected Circuits:
00154284 - 100G DAL/ACORN - acorn-hfxw-1 <> acorn-pnnt-1 - Halifax West to Pennant Point

Service Interruption Duration: less than 30 minute

Service Impact:
Your services will be impacted while we perform Emergency maintenance on a troubled Transport link. https://status.dal.ca/service.php?Service=6 2025-12-11 09:31:52 EXCHANGE NOTICE
Some users may be unable to access M365 apps through the app launcher in Outlook on the web
Service Degradation

Current status: The service provider has determined that this issue isn't specific to users in India and have updated the Title, User impact, and Scope of impact fields to reflect the updated scenario. They've confirmed that their validation of reverting the update to some users in India is effective in remediating the issue; however, this action may not be appropriate when applied broadly. They're assessing a broader rollback of the update while also continuing their analysis of the recent .NET version upgrade so that they can determine if a targeted fix is viable.
Scope of impact: Some users attempting to access Microsoft 365 apps through the app launcher in Outlook on the web may be impacted. This section may be updated as the investigation progresses.
Start time: Tuesday, October 7, 2025, at 12:00 AM UTC https://status.dal.ca/service.php?Service=36 2025-12-10 08:56:39 Service Restored https://status.dal.ca/service.php?Service=38 2025-12-10 08:53:12 M365 NOTICE
Users in Australia may experience issues accessing services including Teams and M365
Service Restored

More info: Users may have experienced issues when attempting to access various M365 services including but not limited to Teams, SharePoint, OneDrive and Exchange Online services.

Final status: The service provider has taken proactive action to reroute all traffic to prevent recurrence of this issue while they address the networking issue contributing to the problem. They monitored the service for an extended period and confirmed that the service was stable and the issue resolved.

Start time: Tuesday, December 9, 2025, at 11:48 PM AST
End time: Tuesday, December 9, 2025, at 11:57 PM AST https://status.dal.ca/service.php?Service=36 2025-12-09 11:13:39 CHANGE CONTROL NOTICE

Type Of Work: Project

Customer: ACORN NS

Change Control ID : 2150648

Start Date (yyyy-mm-dd): 2025-12-10
End Date (yyyy-mm-dd): 2025-12-10

Location Of Work: Halifax - NS

Reason For Work: OSP Forced Relocate

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

Affected Circuits:
00154284 - 100G DAL/ACORN - acorn-hfxw-1 <> acorn-pnnt-1 - Halifax West to Pennant Point

Service Interruption Duration: 5 hours

Service Impact:
Your services will be impacted while we perform a Forced Fiber Relocate https://status.dal.ca/service.php?Service=43 2025-12-09 15:03:57 Resolved:

Power BI/Fabric:
- Users may have been unable to use Git integrations utilizing APIs to perform multiple actions in Power BI/Microsoft Fabric. https://status.dal.ca/service.php?Service=43 2025-12-09 12:54:29 Power BI/Fabric:
- Users may be unable to use Git integrations using APIs to perform multiple actions (such as GET/POST/PUT) in Power BI/Microsoft Fabric. https://status.dal.ca/service.php?Service=9 2025-12-09 11:12:08 Service Restored https://status.dal.ca/service.php?Service=6 2025-12-09 11:06:41 EXCHANGE NOTICE
Some users may be unable to open inbound Secure/Multipurpose Internet Mail Extensions (S/MIME) encrypted email messages
Service Restored

More info: This issue affected users with the Dynamic Delivery policy enabled.
The service provider previously disabled Dynamic Delivery "for S/MIME messages" while they worked to resolve this issue, which has since been re-enabled.
Final status: The service provider has ve confirmed that the configuration has been updated and validated this action has remediated the impact using service telemetry.

Start time: Saturday, November 29, 2025, at 9:00 PM AST
End time: Monday, December 8, 2025, at 7:00 AM AST https://status.dal.ca/service.php?Service=9 2025-12-09 11:11:18 CHANGE CONTROL NOTICE

Type Of Work: Emergency

Customer: Dalhousie

Change Control ID : 2156955

Start Date (yyyy-mm-dd): 2025-12-09
End Date (yyyy-mm-dd): 2025-12-09

Location Of Work: CornerBrooke - NL

Reason For Work: Damaged Fibre Enclosure

Release Window (24 hr format): 00:31 - 05:15 AST

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

Service Interruption Duration: 2 hours https://status.dal.ca/service.php?Service=38 2025-12-08 10:53:33 M365 NOTICE
Users in Australia may experience issues accessing M365 services including Teams
Service Restored

Final status: While the service provider was in the process of analyzing a possible networking issue in Australia, system monitoring indicated that the service had returned to normal health. They've confirmed that the issue is no longer occurring and they'll continue to monitor the service to ensure that the problem doesn't happen again.

Start time: Sunday, December 7, 2025, at 8:12 PM AST
End time: Sunday, December 7, 2025, at 8:42 PM AST https://status.dal.ca/service.php?Service=6 2025-12-08 10:38:24 EXCHANGE NOTICE
Some users may be unable to open inbound Secure/Multipurpose Internet Mail Extensions (S/MIME) encrypted email messages
Service Degradation

More info: This issue strictly impacts users with the Dynamic Delivery policy enabled.
The service provider has temporarily disabled Dynamic Delivery while they work to resolve this issue. This action may result in potential delays of up to fifteen minutes for users to receive email messages with attachments. The length of the delay will depend on the attachments associated with the email message.
Additionally, some users see a "Safe Attachments Scan in Progress" message upon opening an encrypted inbound email message.

Current status: While the service provider reviews HTTP Archive format (HAR) network trace logs to isolate the underlying cause of impact, they've disabled Dynamic Delivery to avoid new email messages from becoming impacted. In parallel, they're in the process of validating a fix to allow delivered S/MIME encrypted email messages to be viewed as expected.

Start time: Saturday, November 29, 2025, at 9:00 PM AST https://status.dal.ca/service.php?Service=6 2025-12-08 10:29:02 EXCHANGE NOTICE
Users may be unable to open Excel files attached to email messages in new Outlook and receive an error
Service Restored

More info: Users received an error stating: "Try opening the file again later."
This issue impacted attachments that contained non-ASCII characters. As a way to avoid impact, users with access to Outlook on the web could have used this to bypass the impact or downloaded the file locally to manually open Excel files.

Final status: The service provider has confirmed that their deployment finished saturating and is now available in the newest version upgrade, 20251128003.06. They've also verified through final customer testing that impact is fully remediated once users upgrade their Outlook clients to version 20251128003.06.

Start time: Friday, November 14, 2025, at 5:00 PM AST
End time: Friday, December 5, 2025, at 3:00 PM AST https://status.dal.ca/service.php?Service=43 2025-12-08 08:29:33 Resolved:

Power BI: Users may have been unable to access the Microsoft Power BI and Microsoft Fabric services. https://status.dal.ca/service.php?Service=39 2025-12-05 15:02:20 TEAMS NOTICE
Users can't enable the Q&A feature when creating Teams town halls
Service Restored

Final status: The service provider has identified that a recent service update to Teams has removed the ability to enable the Q&A feature for newly created town halls. They've reverted the offending update and confirmed with affected users that the Q&A feature can now be enabled for newly created town halls. Town halls created during the period of impact will still be affected, but organizers can disable and reenable the Q&A feature for affected town halls to resolve the issue.

Scope of impact: Your organization was affected by this event, and any user attempting enable the Q&A feature when creating Teams town halls was impacted.

Start time: Thursday, December 4, 2025, at 9:02 PM AST
End time: Friday, December 5, 2025, at 2:34 PM AST https://status.dal.ca/service.php?Service=39 2025-12-05 14:09:12 TEAMS NOTICE
Users can't enable the Q&A feature when creating Teams town halls
Service Degradation

Current status: The service provider is reviewing recent service changes to identify why users can't enable the Q&A feature when creating Teams town halls. https://status.dal.ca/service.php?Service=43 2025-12-05 08:15:47 Power BI:
> Users may be unable to access the Microsoft Power BI and Microsoft Fabric services. https://status.dal.ca/service.php?Service=38 2025-12-04 13:40:41 M365 NOTICE
Users may not be able to download Microsoft 365 desktop apps from the Microsoft 365 homepage
Service Restored

Final status: The service provider validated the fix in their internal testing environment and successfully deployed it across the affected infrastructure. After monitoring the service, they’ve confirmed that download functionality for M365 desktop apps has been restored and the issue is fully remediated.

Start time: Tuesday, December 2, 2025, at 2:21 PM AST
End time: Thursday, December 4, 2025, at 11:30 AM AST https://status.dal.ca/service.php?Service=38 2025-12-04 13:39:05 M365 NOTICE
Users may not be able to download M365 desktop apps from the M365 homepage
Service Degradation

Current status: The service provider's analysis of the components of M365 infrastructure, as well as recently deployed changes, identified that a recent service update containing a code issue is impacting the license check process, leading to users being unable to download M365 desktop apps from the homepage. They've developed a fix and they're working to validate this fix to ensure it successfully addresses the impact. https://status.dal.ca/service.php?Service=32 2025-12-04 07:53:50 Campus Bookings PROD will be restarted at 6:30PM to troubleshoot some user report issues.

This restart should only take Campus Bookings PROD offline for 5-10 minutes. https://status.dal.ca/service.php?Service=9 2025-12-02 11:35:32 Service Restored https://status.dal.ca/service.php?Service=6 2025-12-02 11:34:24 EXCHANGE NOTICE
Some users who are scheduling meetings may not receive accurate declined email messages in Exchange Online
Service Restored

More info: Specifically, when users sent a meeting invitation that was declined by a resource room, the email response may have been missing the Organizer's details.
While the service provider were focused on remediation, impacted users may have been able to avoid impact by utilizing the Auto Room Booking feature, which would show up automatically if they have an active Copilot license when scheduling meetings through the new Outlook desktop client, Outlook on the web, or Teams. After adding attendees and selecting a time for the meeting, organizers with this feature available would see a "Add room with Copilot" button which would enable Auto Room Booking. Once this was enabled, users would see "Copilot Managed" and "Copilot will rebook if the room declines or the meeting was rescheduled". Additionally, when viewing the "Places finder", it should also show this feature as enabled, and when users click "Add a room or location", then "Browse all rooms", users will see "Rebook declined rooms" toggled on.

In order to enable this feature, users must have an active Copilot license and been scheduling meetings using the Outlook (new), Outlook on the web or Microsoft Teams.

Final status: The fix has fully saturated in the affected service environment, and after validating internally in our test environment, the service provider has confirmed that impact has been successfully remediated.

Start time: Sunday, October 26, 2025, at 9:00 PM AST
End time: Saturday, November 29, 2025, at 3:46 AM AST https://status.dal.ca/service.php?Service=9 2025-10-28 15:54:35 CHANGE CONTROL NOTICE

Type Of Work: Project

Change Control ID : 2112171

Start Date (yyyy-mm-dd): 2025-12-02
End Date (yyyy-mm-dd): 2025-12-02

Location Of Work: Cape Ray - NL

Reason For Work: Engineering Project

Release Window (24 hr format): 00:30 - 06:30 AST

Affected Circuits:
00144649 - Dalhousie 10Gig - UPEI Vet College, St John's, NL <> Charlottetown, PE

Service Interruption Duration: 4 hours

Service Impact:
Dal's services will be impacted while the service provider does planned work https://status.dal.ca/service.php?Service=39 2025-12-01 15:06:29 Status
Service Restored

Impacted services
Microsoft Teams

Title: Some users in Brazil may have been unable to join Microsoft Teams meetings
User impact: Users in Brazil may have been unable to join Microsoft Teams meetings.
Final status: We've identified that a section of infrastructure, responsible for facilitating meeting access, inadvertently began performing below acceptable performance thresholds which resulted in impact. We've redirected affected traffic and confirmed impact has been remediated after a period of monitoring.
Scope of impact: Impact was specific to some users in Brazil attempting to join Microsoft Teams meetings.
Start time: Monday, December 1, 2025, at 1:05 PM UTC
End time: Monday, December 1, 2025, at 1:35 PM UTC
Root cause: A section of infrastructure, responsible for facilitating meeting access, inadvertently began performing below acceptable performance thresholds which resulted in impact.
Next steps:
- We're reviewing performance data and trends on the affected systems to help prevent similar impact from happening again.
This is the final update for the event. https://status.dal.ca/service.php?Service=38 2025-12-01 15:38:05 Status
Service Restored


Impacted services
Exchange Online

Title: Some users may be intermittently unable to access their Exchange Online mailboxes using any connection method
User impact: Users may have been intermittently unable to access their Exchange Online mailboxes using any connection method.
Final status: After a period of monitoring service health, we’ve confirmed that this issue is no longer occurring as a result of our fix deployment that removed the affected indexes and performed a recrawl. We’ve determined from our telemetry that this issue is resolved.
Scope of impact: This issue was intermittently impacting a small subset of users, though potentially any user accessing Exchange Online may have been intermittently affected.
Start time: Monday, November 17, 2025, at 5:11 PM UTC
End time: Wednesday, November 26, 2025, at 12:00 PM UTC
Root cause: An indexing issue within a section of mailbox database infrastructure responsible for providing access to Exchange Online mailboxes caused mailbox state invalidations and client disconnections, resulting in impact.
Next steps:
- We’ve identified the source of the indexing issue and are developing a solution to prevent issues like this from occurring in the future.
This is the final update for the event. https://status.dal.ca/service.php?Service=17 2025-11-28 18:18:34 Update @ 1830

Connectivity has been restored to both wired and wireless networks. ITS will continue to monitor, but all systems have returned to normal service. https://status.dal.ca/service.php?Service=9 2025-11-28 18:18:18 Update @ 1830

Connectivity has been restored to both wired and wireless networks. ITS will continue to monitor, but all systems have returned to normal service. https://status.dal.ca/service.php?Service=36 2025-11-28 18:17:53 Update @ 1830

Connectivity has been restored to both wired and wireless networks. ITS will continue to monitor, but all systems have returned to normal service. https://status.dal.ca/service.php?Service=36 2025-11-28 17:09:48 Update on Network Issues 1700h

Network issues continue at this time and troubleshooting continues with the assistance of vendor support. An ETA on complete repair is not available at this time, but updates will be posted regularly or if the conditions change. https://status.dal.ca/service.php?Service=17 2025-11-28 17:09:15 Update on Network Issues 1700h

Network issues continue at this time and troubleshooting continues with the assistance of vendor support. An ETA on repair is not available at this time, but updates will be posted regularly or if the condition changes. https://status.dal.ca/service.php?Service=9 2025-11-28 17:08:50 Update on Network Issues 1700h

Network issues continue at this time and troubleshooting continues with the assistance of vendor support. An ETA on repair is not available at this time, but updates will be posted regularly or if the condition changes. https://status.dal.ca/service.php?Service=36 2025-11-28 16:07:44 Wide spread network outage affecting areas.
Technicians are investigating. https://status.dal.ca/service.php?Service=19 2025-12-10 15:44:44 Maintenance complete https://status.dal.ca/service.php?Service=17 2025-11-28 15:54:05 Wide spread network outage affecting areas.
Technicians are investigating. https://status.dal.ca/service.php?Service=9 2025-11-28 15:54:16 Wide spread network outage affecting areas.
Technicians are investigating. https://status.dal.ca/service.php?Service=6 2025-11-27 15:46:35 EXCHANGE NOTICE
Users may be unable to open Excel files attached to email messages in new Outlook and receive an error
Service Degradation

More info: Users receive an error stating: "Try opening the file again later."
This issue impacts attachments that contain non-ASCII characters. As a way to avoid impact, users can utilize Outlook on the web or download the file locally to manually open Excel files.

Current status: The service provider has developed a fix to address the missing encoding in the requests used to open files. They're validating this deployment while they work to understand why this encoding error is occurring. https://status.dal.ca/service.php?Service=38 2025-11-26 09:53:37 M365 NOTICE
Users utilizing SafeLinks may receive a false positive error message when attempting to open a specific link
Service Restored

More info: Users who received the link, https://m365.cloud.microsoft/chat, and who had Safelinks enabled, may have seen the following warning “This message contains a link that might been unsafe or malicious.” This link was incorrectly marked as unsafe and was actually not a threat.
If the link was clicked despite the warning, the user may have been blocked from opening it.

Final status: The service provider identified that an automated mechanism utilized for protecting users from phishing and spam attacks incorrectly classified the aforementioned link as malicious. They've added the link to the allow list and have validated with service health telemetry that this issue was resolved by their actions.
Scope of impact: Your organization was impacted by this event, and users utilizing SafeLinks may have received a false positive error message when attempting to open a specific link.
Start time: Tuesday, November 25, 2025, at 12:20 PM UTC
End time: Tuesday, November 25, 2025, at 6:40 PM UTC https://status.dal.ca/service.php?Service=19 2025-11-26 09:35:56 EAS will be doing some Papercut maintenance the morning of November 27, starting at 7am for about an hour. It will be unavailable during the maintenance. https://status.dal.ca/service.php?Service=6 2025-11-25 10:31:06 EXCHANGE NOTICE
Some users may be unable to search in the Outlook Desktop client and Outlook on the Web
Service Degradation

User impact: Users are unable to search in the Outlook Desktop client and Outlook on the Web.

Current status: The service provider is proceeding to review service monitoring telemetry and support provided information to isolate the root cause and establish a fix.

Scope of impact: Impact is specific to some users attempting to search in the Outlook Desktop client and Outlook on the Web. https://status.dal.ca/service.php?Service=19 2025-11-26 09:35:02 Issue resolved https://status.dal.ca/service.php?Service=38 2025-11-25 09:08:02 M365 NOTICE
Some organizers may have seen that mandatory labeling wasn’t applying when creating new meetings
Service Restored

More info: Impact was specific to meetings created using the Teams calendar and Outlook on the web using the Quick Compose pop-up. Additionally, impact was specific to admins who had a policy applied where sensitivity labels are mandatory, and there's no default label configured.
Attendees saw that there was no sensitivity label applied, but they could still access and attend the meeting without complications. Users with access to the Outlook desktop client could use that method to avoid this issue.

Final status: The service provider confirmed that the issue is resolved following the deployment of the fix. https://status.dal.ca/service.php?Service=21 2025-11-24 16:02:01 Active Issue:

- Users with edit and full control permissions may be unable to access or share some files in SharePoint Online that were deleted and recently restored from the recycle bin.


Resolved Issues:

- Some users may have been unable to load pages with custom apps or webparts in SharePoint Online and get an error.
- Users may have been unable to open SharePoint Online libraries from navigation library links. https://status.dal.ca/service.php?Service=21 2025-11-24 11:19:24 Active Issues:

- Users may be unable to open SharePoint Online libraries from navigation library links. When opening the library link from navigation, a redirects occurs to an xml page instead of the library content but a page refresh displays the content as expected.

- Some users may be unable to load pages with custom apps or webparts in SharePoint Online and get an error.

- Users with edit and full control permissions may be unable to access or share some files in SharePoint Online that were deleted and recently restored from the recycle bin. https://status.dal.ca/service.php?Service=43 2025-11-24 09:02:14 Resolved:

Power BI:
Users may have seen that Power BI Desktop files (PBIX) didn't refresh when stored on Microsoft OneDrive when a specific setting "OneDrive refresh" was turned on. https://status.dal.ca/service.php?Service=24 2025-11-22 07:03:16 The upgrade is complete and service has been restored. Some clients may need to reconnect any sessions that existed before the work began. https://status.dal.ca/service.php?Service=24 2025-11-21 15:51:22 A firmware update will be applied to the appliance that hosts the nas.dal.ca (O drive) service. Although this device has high availability configured, there may be disruption in service during this window. https://status.dal.ca/service.php?Service=39 2025-11-21 16:07:00 TEAMS NOTICE
Service Restored
MO1188691


More info: Users may be unable to publish Apps in the Teams App Store and the Copilot Agent Store

Final status: We've identified that a recent Content Delivery Network (CDN) ingestion infrastructure configuration change had resulted in impact. To remediate this, we reverted the offending configuration change and reprocessed all previously affected apps and completed the backlog of ingestion data. After monitoring the service, we verified that the issue has been successfully resolved.

Root cause: A recent Content Delivery Network (CDN) related ingestion infrastructure configuration change had resulted in impact. https://status.dal.ca/service.php?Service=39 2025-11-21 09:47:40 TEAMS NOTICE
Details
Service Degradation
MO1188691

More info: Users may be unable to publish Apps in the Teams App Store and the Microsoft Copilot Agent Store

Current status: We're reviewing service monitoring telemetry to isolate the root cause and develop a remediation plan. https://status.dal.ca/service.php?Service=6 2025-11-21 09:39:24 EXCHANGE NOTICE
Status
Service Degradation
EX1188132


More info: Some users may be intermittently unable to access their Exchange Online mailboxes using any connection method

Current status: Our analysis of provided logs and telemetry indicates that some databases that facilitate Exchange Online mailbox access are experiencing excessive CPU utilization causing some requests to fail, resulting in impact. We're expanding our investigation to identify the specific processes responsible for impact and determine a mitigation strategy. https://status.dal.ca/service.php?Service=43 2025-11-20 15:09:41 Active Issue:

Power BI:
Users see that Power BI Desktop files (PBIX) don't refresh when stored on Microsoft OneDrive when a specific setting "OneDrive refresh" is turned on. In addition, users trying to refresh Excel and .csv files with OneDrive will also see failures. Users may be able to circumvent the issue by manually refreshing.


Resolved Issue:

Power Automate:
Users may experience failures with flow management operations, manually triggered flows, and Admin consent scenarios. https://status.dal.ca/service.php?Service=43 2025-11-20 14:16:13 Power Automate:
Users may experience failures with flow management operations, manually triggered flows, and Admin consent scenarios. https://status.dal.ca/service.php?Service=39 2025-11-20 12:59:13 TEAMS NOTICE
Service Degradation
TM1185553

Current status: We've successfully identified and developed a fix for the regression. We've initiated the deployment of the fix which has reached an estimated 70 percent of the impacted service environments. Some users may see impact remediation as the fix fully saturates. We'll continue to monitor the fix deployment to ensure it fully completes and remediates impact as expected.

Scope of impact: Any user may be affected by this event, and the issue may impact users viewing suggested replies in Teams. This section may be updated as our investigation continues. https://status.dal.ca/service.php?Service=38 2025-11-20 12:54:03 M365 NOTICE
Service Restored
MO1188100

More info: Impacted services included, but were not limited to:
- Exchange Data Loss Prevention (DLP) and Autolabeling
- Endpoint DLP
- OneDrive for Business and SharePoint Online DLP and Autolabeling
- Copilot grounding
- Defender for Cloud Apps
- Inline DLP
- Purview, including the Purview browser extension
- Purview DLP Agent

Final status: We’ve confirmed recovery efforts were successful, and service health has been fully restored.

Scope of impact: Impact was specific to some users who were served by sections of infrastructure located in North America and Europe and were attempting to leverage Data Classification and Sensitivity labeling services such as those identified in the More info section above. https://status.dal.ca/service.php?Service=37 2025-11-27 12:15:44 Service Restored https://status.dal.ca/service.php?Service=39 2025-11-20 12:10:02 Status

Service Restored
TM1186997


Title: Some users may be unable to join teams in Teams when using a join code

User impact: Users may have been unable to join teams in Teams when using a join code.

More info: Users saw a specific error that translated to “Couldn't join this team with that code. Double-check the code or try another one”.
As workaround, users could’ve sent a link to join the team to bypass using the join code.

Final status: Our fix deployment is complete and we’ve determined from service telemetry that this issue is resolved.

Scope of impact: This problem may have intermittently impacted any user attempting to join teams in Teams when using a join code.

Start time: Wednesday, November 12, 2025, at 10:00 PM UTC

End time: Tuesday, November 18, 2025, at 9:50 PM UTC

Root cause: A recent update for Teams contained a code issue that was impacting join code functionality.

Next steps:
- We’re reviewing our validation and updating procedures to better detect and prevent issues like this prior to deployment in the future.
This is the final update for the event. https://status.dal.ca/service.php?Service=37 2025-11-19 15:31:46 Ticket ID: 21104 (Maintenance - Scheduled - Major)
Start Date: Nov 19, 2025 11:59 PM AST
End Date: Nov 20, 2025 04:04 AM AST
Cause: Hardware - Software upgrade

Service Outage Details
During this event, users could have trouble using one of the specified services in the specified regions. PTT active calls will drop, new calls can be initiated after 30 seconds.

Impacted Services
Push to Talk https://status.dal.ca/service.php?Service=6 2025-11-26 08:58:11 EXCHANGE NOTICE
Some users may be unable to send or receive email messages through the iOS Mail app using Exchange ActiveSync (EAS)
Service Degradation

More info: The impacted users can authenticate without issue, but they receive the error "Cannot Get Mail. The connection to the server failed." when trying to refresh email messages in the Mail app.

Current status: The service provider has identified a potential source of impact where a recent HTTP3 configuration change for the QUIC feature in the Exchange Online client access path may be resulting in intermittent mail delivery failures for a limited number of native iOS Mail clients. They’ve disabled this change in the affected environments and are currently requesting impacted users test while they await confirmation that this action has successfully resolved the issue, which would validate their findings. https://status.dal.ca/service.php?Service=38 2025-11-19 14:10:25 M365 NOTICE
Multiple issues within M365 related to data classification and sensitivity service
Service Degradation

More info: Impacted services include, but are not limited to:
- Exchange Data Loss Prevention (DLP) and Autolabeling
- Endpoint DLP
- OneDrive for Business and SharePoint Online DLP and Autolabeling
- Copilot grounding
- Defender for Cloud Apps
- Inline DLP
- Purview

Current status: The service provider has determined that the Data Classification Service (DCS), which multiple services leverage for actions such as Sensitivity labelling, Data Loss Prevention (DLP) policy applications and Copilot grounding, is not routing requests to active components correctly, resulting in impact. They’re currently investigating why this is occurring and developing a mitigation strategy.

Scope of impact: Impact is specific to some users located in North America and Europe, attempting to perform any action on files within Copilot. https://status.dal.ca/service.php?Service=38 2025-11-19 09:31:27 M365 NOTICE
Some organizers may see that mandatory labeling isn't applying when creating new meetings
Service Degradation

More info: Impact is to meetings created using the Teams calendar and Outlook on the web using the Quick Compose pop-up. Additionally, impact is specific to admins who have a policy applied where sensitivity labels are mandatory, and there's no default label configured.

Attendees will see that there's no sensitivity label applied, but they can still access and attend the meeting without complications. Users with access to the Outlook desktop client cans use that method to avoid this issue.

Current status: The service provider has received reports of an issue in which some organizers may see that mandatory labeling isn't applying to some meetings that are created using the Quick Compose pop-up in Teams calendar and Outlook on the web. They're investigating service side logs to help with isolating the root cause and determining a remediation plan. https://status.dal.ca/service.php?Service=38 2025-11-19 09:33:27 M365 NOTICE
Users may have been unable to install Office 365 desktop apps on Windows devices
Service Restored

More info: This only impacted users who attempted to install version 2508 (Build 19127.20358) and version 2507 (Build 19029.20294) of the Office 365 desktop apps.

Final status: The service provider has confirmed that the fixed build is fully deployed and available and they’ve determined that users are now able to install Office 365 desktop apps on Windows devices as expected.

Start time: Tuesday, November 11, 2025, at 3:00 PM AST
End time: Tuesday, November 18, 2025, at 6:00 PM AST https://status.dal.ca/service.php?Service=37 2025-11-19 08:54:46 Service Restored https://status.dal.ca/service.php?Service=37 2025-11-18 15:10:04 NOTICE
Ticket ID: 21103 (Maintenance - Scheduled - Critical)
Start Date: Nov 18, 2025 10:00 PM AST
End Date: Nov 19, 2025 07:00 AM AST
Cause: Upgrade - Software

Service Outage Details
During this event, users could have trouble using one of the specified services in the specified regions. PTT active calls will drop, new calls can be initiated after 30 seconds.

Impacted Services
Push to Talk https://status.dal.ca/service.php?Service=21 2025-11-18 14:34:56 Active Issues:

- Some users may be unable to load pages with custom apps or webparts in SharePoint Online and get an error.

- Users with edit and full control permissions may be unable to access or share some files in SharePoint Online that were deleted and recently restored from the recycle bin. https://status.dal.ca/service.php?Service=39 2025-11-18 14:15:09 TEAMS NOTICE
Users are unable to join teams in Teams when using a join code
Service Degradation

More info: Users get a specific error that translates to “Couldn't join this team with that code. Double-check the code or try another one”.

Current status: The service provider is continuing their analysis of the case details, as well as reviewing details from an internal reproduction of the issue and logs from the impacted service, to help isolate the underlying cause of impact. https://status.dal.ca/service.php?Service=39 2025-11-18 14:18:03 TEAMS NOTICE
Some users may be unable to interact with bots or agents within Teams
Service Restored

Final status: The service provider has isolated an unexpected increase in user traffic that caused their service infrastructure responsible for managing bot and agent interactions within Teams to drop in availability. This resulted in users located in North and South America possibly being unable to interact with bots and agents within Teams. They implemented performance optimizations to process the increased traffic and after completing their monitoring period, they confirmed their actions have restored service.

Start time: Tuesday, November 18, 2025, at 11:00 AM AST
End time: Tuesday, November 18, 2025, at 12:19 PM AST https://status.dal.ca/service.php?Service=6 2025-11-18 09:23:29 EXCHANGE NOTICE
Users may be unable to delete a user from the contact list within Outlook on the web
Service Degradation

Current status: The service provider has identified that the issue relates to how certain email address formats are being processed. To help them better understand and resolve this, they’ve made changes to improve their diagnostic data and are waiting for these updates to fully apply across the service. This will allow them to obtain more detailed information to isolate the cause of impact and determine the next steps toward a fix. https://status.dal.ca/service.php?Service=19 2025-11-17 17:21:14 Papercut is experiencing issues. Technicians are investigating. https://status.dal.ca/service.php?Service=6 2025-11-17 10:07:02 EXCHANGE NOTICE
Users may see some parts of the Outlook UI in English instead of their non-English selected language
Service Restored

Final status: The service provider has reverted the offending update and confirmed through monitoring service health telemetry that the impact has been remediated.

Scope of impact: This issue may have affected any user whose language was set to a non-English language and was using Outlook on the web or the new Outlook desktop client.

Start time: Monday, November 10, 2025, at 1:00 PM AST
End time: Friday, November 14, 2025, at 7:00 PM AST https://status.dal.ca/service.php?Service=39 2025-11-17 09:25:59 TEAMS NOTICE
Users may see that composed text is rendered in a different font once sent in Teams
Service Restored

More info: Users reported that impact was occurring on the Teams web client (Version: 25227.203.3915.2444) and the desktop client (Version: 25255.703.3978.7153).
Impact seemed to be specific to text using SimSun fonts.

Final status: The serviec provider has confirmed their fix deployment saturated across the entire affected infrastructure and remediated impact.

Scope of impact: Any user sending SimSun font text from Teams web client version 25227.203.3915.2444 and desktop client version 25255.703.3978.7153 may have been affected.

Start time: Monday, September 15, 2025, at 12:30 PM AST
End time: Friday, November 14, 2024, at 3:36 PM AST https://status.dal.ca/service.php?Service=13 2025-11-17 09:09:42 The PROD database and associated applications will be unavailable on Sunday November 16th from 6:00 a.m. to 6:00 p.m. for planned system maintenance. https://status.dal.ca/service.php?Service=6 2025-11-14 15:13:48 EXCHANGE NOTICE
Users may see some parts of the UI in English instead of their non-English selected language
Service Degradation

Current status: The service provider is investigating a potential issue where users with non-English languages selected as their default language may see some parts of Outlook on the web and the new Outlook experience in English, and they're checking for impact to our organization. https://status.dal.ca/service.php?Service=38 2025-11-17 10:15:22 Users may be unable to install Microsoft 365 desktop apps on Windows devices

Issue ID: OP1186186
Affected services: Microsoft 365 apps
Status: Service degradation
Issue type: Incident
Start time: Nov 14, 2025, 11:52 AM AST

More info
This only impacts users who attempt to install version 2508 (Build 19127.20358) and version 2507 (Build 19029.20294) of the Microsoft 365 desktop apps.

Scope of impact
Any user attempting to install Microsoft 365 desktop apps on Windows devices may be impacted.

Root cause
A newly released set of authentication components contain a misconfiguration that prevents users from installing Microsoft 365 desktop apps on Windows devices.


Current status

Nov 14, 2025, 6:49 PM AST
We're continuing to develop a set of two builds that address the authentication component misconfigurations, with the build for version 2508 validated and in the process of deploying. We anticipate that our second build for version 2507 will be ready for final validation by our next scheduled update, after which we'll deploy to fully remediate impact. https://status.dal.ca/service.php?Service=6 2025-11-14 09:23:49 EXCHANGE NOTICE
Some users may experience delays in loading images and attachments in Exchange Online email messages
Service Restored

More info: Delays may have been up to ten seconds. Some users' signature add-in images may have also been affected.

Final status: The service provider has confirmed that their fix deployment has reached the vast majority of the affected environment and determined from monitoring service telemetry that this issue is no longer occurring.

Start time: Monday, November 3, 2025, at 1:31 PM AST
End time: Thursday, November 13, 2025, at 3:15 PM AST https://status.dal.ca/service.php?Service=9 2025-11-14 08:57:30 Work was successfully completed. https://status.dal.ca/service.php?Service=19 2025-11-14 08:47:25 The issues with Papercut have been resolved. https://status.dal.ca/service.php?Service=43 2025-11-14 08:09:18 Power BI:
Users see that Power BI Desktop files (PBIX) don't refresh when stored on Microsoft OneDrive when a specific setting "OneDrive refresh" is turned on. In addition, users trying to refresh Excel and .csv files with OneDrive will also see failures. Users may be able to circumvent the issue by manually refreshing. https://status.dal.ca/service.php?Service=37 2025-11-13 09:20:42 Service Restored https://status.dal.ca/service.php?Service=38 2025-11-13 08:58:00 ONENOTE NOTICE
Some users can't create or publish Assignments in OneNote or create a class notebook in a team
Service Restored

More info: In addition, users were unable to create notebooks in OneNote Class Notebook.
While the service provider focused on remediation, users and admins with access to PowerShell or Graph API could use the following article to manually setup class notebooks: https://support.microsoft.com/en-us/topic/provisioning-classes-at-scale-using-powershell-and-microsoft-graph-3428f18f-ff38-4c46-a696-3318e463cbec

Final status: The service provider monitored the service telemetry and confirmed that impact has been successfully remediated by their actions.

Start time: Sunday, August 10, 2025, at 8:00 PM AST
End time: Wednesday, November 12, 2025, at 9:30 PM AST https://status.dal.ca/service.php?Service=21 2025-11-13 08:11:23 Active Issue:
- Users with edit and full control permissions may be unable to access or share some files in SharePoint Online that were deleted and recently restored from the recycle bin.


Resolved Issue:
- Users may have been unable to use the site search functionality in SharePoint Online. When attempting to interact with the site search box, the box may not have reacted or performed any searches. https://status.dal.ca/service.php?Service=37 2025-11-10 16:00:54 NOTICE

Ticket ID: 21097 (Maintenance - Scheduled - Major)
Start Date: Nov 12, 2025 11:59 PM AST
End Date: Nov 13, 2025 07:00 AM AST
Cause: Upgrade - Software

Service Outage Details
PTT active calls will drop, new calls can be initiated after 30 seconds.

Impacted Services
Push to Talk https://status.dal.ca/service.php?Service=19 2025-11-12 17:04:44 Papercut is experiencing issues. Technicians are investigating.