Microsoft Teams desktop client launch failure from service update regression
Service Disruption
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Microsoft reverted a service update after it left some Microsoft Teams desktop client users unable to launch the app, disrupting access and leaving affected clients on the loading screen. Microsoft attributed the breakage to a regression in the Teams client build caching system and said an automated recovery system had remediated impact. Impacted users are being told to fully quit and restart Teams so the fix propagates.
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Timeline
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20.04.2026 12:40 2 articles · 1mo ago
Microsoft reverts Teams service update after launch failures
Mitigation Patch UpdateMicrosoft reverted a service update after some customers using older Microsoft Teams desktop client builds were unable to launch Teams and were stuck on the loading screen. Microsoft attributed the failure to a regression in the Microsoft Teams client build caching system, said automated recovery had already remediated impact for some users, and instructed impacted users to fully quit and restart Teams so the fix would propagate.
Show sources
- Microsoft pulls service update causing Teams launch failures — www.bleepingcomputer.com — 20.04.2026 12:40
- Microsoft pulls service update causing Teams launch failures — www.bleepingcomputer.com — 20.04.2026 12:40