Status Page

O365 - Email/Outlook

2025-09-02	Status	Description
11:56 AM		EXCHANGE NOTICE Some attendees may receive an unexpected cancellation message when an Exchange Online shared calendar event is updated Service Restored Final status: The service provider confirmed after a period of monitoring that issue has been remediated. Scope of impact: Some attendees with enabled calendar sharing improvements may have been intermittently receiving cancellation messages for updated shared calendar events when the event was still active. Start time: Wednesday, June 4, 2025, at 9:00 PM AST End time: Tuesday, September 2, 2025, at 2:00 AM AST
10:56 AM		EXCHANGE NOTICE Users may not see updated unread message counts for some folders in Outlook on the web and Outlook for Mac Service Restored More info: Users may need to refresh to see updated counts. Final status: The update has been disabled and the service provider has confirmed through service telemetry that impact is remediated. Scope of impact: Impact was specific to some users attempting to see updated unread message counts for some folders in Outlook on the web and Outlook for Mac. Start time: Friday, August 22, 2025, at 8:00 PM AST End time: Saturday, August 30, 2025, at 1:30 PM AST
10:54 AM		EXCHANGE NOTICE Users may be unable to access sender.office.com Service Restored More info: As a result of being unable to access sender.office.com, users may have been unable to delist IP addresses from the service provider's anti-spam lists. Final status: the service provider performed additional troubleshooting and they were able to successfully reconfigure the impacting authentication component. Once the reconfiguration completed, they restarted system services and monitored the environment to validate that the impact was remediated. Start time: Wednesday, August 27, 2025, at 7:59 PM AST End time: Friday, August 29, 2025, at 6:50 PM AST
10:43 AM		EXCHANGE NOTICE Users may be unable to access sender.office.com Service Degradation More info: As a result of being unable to access sender.office.com, users may be unable to delist IP addresses from the service provier's anti-spam lists. Current status: The service provider has identified that an authentication component within a portion of service infrastructure is misconfigured and causing the impact. They're working to reconfigure the authentication component to restore the service to expected functionality.

2025-08-27	Status	Description
10:29 AM		EXCHANGE NOTICE Some users may be unable to modify Exchange Online groups in Outlook on the web and encounter an error Service Degradation More info: Affected users may encounter the following error: "This doesn't look right." As a workaround, users who have access may be able to utilize the Outlook desktop client. Current status: The service provider is monitoring the fix deployment as it progresses.
09:19 AM		EXCHANGE NOTICE Users may not see updated unread message counts for some folders in Outlook on the web and Outlook for Mac Service Degradation More info: Users may need to refresh to see updated counts. Current status: The service provider is continuing to investigate recent service updates to isolate the source of the exceptions and determine the cause of the authentication issues they're seeing in the affected environment. They're attempting to reproduce the issue to test which components of the recent updates are triggering the impact.

2025-08-26	Status	Description
09:37 AM		EXCHANGE NOTICE Some users may see the time indicator on their calendars isn't reflecting accurately or updating Service Degradation More info: Impact is specific to users' calendars on the new Outlook desktop experience and Outlook on the web. Affected users can restart the impacted Outlook client to have the time indicator sync and reflect accurately. Current status: The service provider has received reports of an issue in which some users may see the time indicator on their calendars isn't reflecting accurately or updating on the new Outlook desktop experience and Outlook on the web. They suspect a recent Microsoft Edge update may have introduced a compatibility issue that's preventing the time indicator from updating and reflecting properly. They've developed a code change that they're deploying to their internal testing environment for validations to ensure it remediates impact before they deploy it to a broader scale.

2025-08-22	Status	Description
11:27 AM		EXCHANGE NOTICE Some users are unable to send or receive email from the Outlook mobile app on their devices Service Degradation More info: Affected users would be utilizing Hybrid Modern Authentication (HMA). Current status: The service provider is continuing to monitor the progress of the deployment as it continues to saturate the affected environment. They'll provide a timeline for the completion of the deployment as one becomes available.