Some users may see a stale profile or unknown user for federated users in external chats and calls in Microsoft Teams

Title: Some users may see a stale profile or unknown user for federated users in external chats and calls in Microsoft Teams

User impact: Users may see a stale profile or unknown user for federated users in external chats and calls in Microsoft Teams.

More info: Impacted users may see the issue occurring for federated users in chats, calls, channels, and any other service feature that shows federated users. Impact occurs in all Microsoft Teams clients.

Current status: We’ve completed the first stage of the previously mentioned performance optimizations, and we’ve observed a corresponding reduction in manifestations of impact. While development of our long-term fix is ongoing, we’re continuing to apply the planned optimizations to further reduce impact and remediate this issue as expediently as possible.

Scope of impact: Some users interacting with federated users from any Microsoft Teams client may be impacted.

Start time: Wednesday, December 6, 2023, at 11:00 AM UTC

Root cause: An imbalance of service load on a portion of infrastructure responsible for populating federated users’ data and information in Microsoft Teams that’s resulting in impact.

Next update by: Monday, March 18, 2024, at 7:30 PM UTC