Some users may encounter various access and availability issues in Microsoft Teams
ID: TM1466796
Issue type: Incident
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Impacted services
Microsoft Teams
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Details
Title: Some users may encounter various access and availability issues in Microsoft Teams
User impact: Users may have encountered various access and availability issues in Microsoft Teams.
More info: Specifically, users may have encountered impact for the following scenarios:
- Users may have not been able to access their calendars from within Teams.
- Users may have encountered failures or delays when attempting to schedule meetings and/or live events.
- Users may have been unable to load other users' profile cards.
- Users may have encountered failures and delays when loading file lists.
- Users may have not been able to create new teams & channels.
- Users may have not been able to install apps.
- Users' searches may have failed or been delayed.
- Users may have seen delays in admin policy changes taking effect.
- Teams Graph API operations may have failed or been delayed.
Final status: We've identified that a recent service update introduced a processing inefficiency that resulted in impact. Additionally, we've identified that although the bulk of impact occurred for users in Australia, users in other regions may also have been impacted. We've reverted the service to its most recent healthy state to resolve the issue and confirmed through telemetry that impact is fully remediated.
Scope of impact: Any user attempting to utilize Microsoft Teams for various scenarios detailed in the above "More info" section may have been impacted.
Start time: Thursday, September 3, 2026, at 11:00 PM UTC
End time: Friday, September 4, 2026, at 3:10 AM UTC
Root cause: A recent service update introduced a processing inefficiency that resulted in impact.
Next steps: We're reviewing our update testing and validation methods to better identify potential issues such as this prior to deployment so we can better prevent similar impact in the future.
This is the final update for the event.
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