Microsoft 365 outage hits Outlook, Teams, Copilot and AI connectors
Original title: Microsoft Cloud Outage Hits Outlook, Teams, Copilot and AI Services
Downdetector logged more than 97,000 Outlook reports; Microsoft later blamed unexpectedly unavailable servers, not extra traffic.
Microsoft 365, Outlook, and Teams were disrupted for thousands of US users on November 12, and Microsoft later said users worldwide could be affected. Admin notice MO1550821 warned of trouble reaching Exchange Online, Teams, SharePoint Online, Microsoft 365 Copilot, and Microsoft Defender XDR. Microsoft said the outage began at 1:26 p.m. ET and that unavailable servers, not increased traffic, strained remaining infrastructure. OpenAI and Anthropic reported failures in connectors that reach Microsoft 365 accounts. A separate Teams incident, TM1550488, was resolved.
Unconfirmed: The count of affected users may vary, and the main outage was unresolved when reported.
- Downdetector logged more than 38,000 Microsoft 365 reports and about 4,500 for Teams.
- Microsoft paused deployments, shifted traffic, and began restarting affected servers.
- The company said it was working to return unavailable servers safely.
- The separate Americas Teams outage ran from 9:45 to 10:53 a.m. ET.
- At publication, the main outage had not been resolved.
- 1.Check the Microsoft 365 admin center for updates on MO1550821.
- 2.Expect delayed email and messages until services recover.
From the original article
3 min read at securityaffairs.com
A Microsoft outage disrupted Outlook, Teams and Copilot, also breaking OpenAI and Anthropic connectors to Microsoft 365 accounts. Microsoft 365, Outlook and Teams went down for thousands of US users on Thursday, November 12. Reuters reported that the disruption also hit the connectors OpenAI’s and Anthropic’s AI services use to reach Microsoft accounts.
By Pierluigi Paganini · securityaffairs.com
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