Wednesday, May 27, 2020

M365 Service Health Notification

Microsoft

Microsoft Teams service alert

Incident information

Title: All users may be unable to start chats with federated Skype for Business users
ID: TM214398

Status

Service Restored

Details

Title: All users may be unable to start chats with federated Skype for Business users

User Impact: Users may have been unable to start chats with federated Skype for Business users.

Final status: We've reverted the impacting update and confirmed with affected users in multiple regions that the issue is resolved.

Scope of impact: This issue may have affected any Teams user attempting to start a chat with a federated Skype for Business user.

Start time: Wednesday, May 27, 2020, at 6:00 AM UTC

End time: Wednesday, May 27, 2020, at 7:24 PM UTC

Root cause: A standard update to the infrastructure facilitating Microsoft Teams and Skype for Business federation unexpectedly resulted in impact.

Next steps:

- We're reviewing our update procedures to identify similar issues prior to deployment.

This is the final update for the event.

Thank you,
The Microsoft team

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