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 applied another round of performance optimizations to the affected Time to Live (TTL) caches to further reduce the likelihood of this issue occurring. Additionally, we’re validating a client-side fix to permanently address the underlying problem. We anticipate that we’ll have a better estimation of the timeline for the fix deployment by our next update.

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: Wednesday, March 20, 2024, at 7:30 PM UTC