Microsoft rolls back Teams update that bricked desktop client launches

Microsoft reverted a service-side update on Friday after a regression in the Teams desktop client build caching system left users stuck on the loading screen with a ‘trouble loading your message’ error. The company tracked the incident as TM1283300, attributing it to older desktop client builds entering an unhealthy state due to a transient service infrastructure issue. An automated recovery system handled initial remediation, but the underlying buggy update was pulled roughly three hours after acknowledgement.

Affected users need to fully quit and relaunch Teams for the rollback to propagate to their machines. Microsoft has not disclosed the scope of impact by user count or region, but classified the event as an incident — its designation for critical service issues with noticeable user impact.

This follows a string of recent Microsoft reliability failures: a Classic Outlook launch bug triggered by the latest Teams Meeting Add-in, out-of-band fixes for broken Microsoft account sign-ins across multiple apps, and weekend emergency updates for Windows Server issues that were breaking security patch installs and putting domain controllers into restart loops.