Status Page

2026-04-01	Status	Description
12:54 PM		Service Restored Title: Some users receiving cross-cloud chat messages may have seen unknown users in Microsoft Teams User impact: Users receiving cross-cloud chat messages may have seen unknown users in Microsoft Teams. Final status: We've identified that a recent standard service update, intended to prepare the service for a new feature to improve the experience for organizations that use cross-cloud chat messages, inadvertently contained a code regression that was resulting in impact. We've reverted the aforementioned update and confirmed impact is no longer occurring after a period of monitoring. Scope of impact: Impact was specific to some users receiving messages through Microsoft Teams. Start time: Tuesday, March 24, 2026, at 6:00 PM UTC End time: Wednesday, April 1, 2026, at 12:40 PM UTC Root cause: A recent standard service update, intended to prepare the service for a new feature to improve the experience for organizations that use cross-cloud chat messages, inadvertently contained a code regression that was resulting in impact.
11:10 AM		Service Restored Title: Some users may receive Microsoft Teams meeting invitations as “not supported calendar message.ics" attachments User impact: Users may have received Microsoft Teams meeting invitations as “not supported calendar message.ics” attachments. Final status: We've identified a regression was introduced with a recent feature implementation for meeting join link validations, which is leading to this issue. While we continue to investigate what led to this impact within the feature, we've disabled the feature to bypass the path of the regression and confirmed this has addressed the problem.
08:35 AM		Service Restored Title: Some guest users may be unable to unmute their mics in recurring Microsoft Teams meetings when recording is enabled

12:54 PM

Service Restored

Title: Some users receiving cross-cloud chat messages may have seen unknown users in Microsoft Teams
User impact: Users receiving cross-cloud chat messages may have seen unknown users in Microsoft Teams.
Final status: We've identified that a recent standard service update, intended to prepare the service for a new feature to improve the experience for organizations that use cross-cloud chat messages, inadvertently contained a code regression that was resulting in impact. We've reverted the aforementioned update and confirmed impact is no longer occurring after a period of monitoring.
Scope of impact: Impact was specific to some users receiving messages through Microsoft Teams.
Start time: Tuesday, March 24, 2026, at 6:00 PM UTC
End time: Wednesday, April 1, 2026, at 12:40 PM UTC
Root cause: A recent standard service update, intended to prepare the service for a new feature to improve the experience for organizations that use cross-cloud chat messages, inadvertently contained a code regression that was resulting in impact.

11:10 AM

Service Restored

Title: Some users may receive Microsoft Teams meeting invitations as “not supported calendar message.ics" attachments
User impact: Users may have received Microsoft Teams meeting invitations as “not supported calendar message.ics” attachments.
Final status: We've identified a regression was introduced with a recent feature implementation for meeting join link validations, which is leading to this issue. While we continue to investigate what led to this impact within the feature, we've disabled the feature to bypass the path of the regression and confirmed this has addressed the problem.

08:35 AM

Service Restored

Title: Some guest users may be unable to unmute their mics in recurring Microsoft Teams meetings when recording is enabled