Microsoft 365 mail is still recovering after a Nov. 12 outage

Microsoft's service health dashboard timed an Exchange Online failure to 16:17 UTC on Nov. 12 that CIO reported spreading to Teams, SharePoint, Copilot, Defender, Intune, Power BI, and Purview. The company later said many servers were unexpectedly unavailable because a secure-connection process was overwhelmed, and a dashboard copy said there was no evidence of malicious activity. Nov. 13 updates still described intermittent mailbox problems and a 48-hour email timeout, and the Guardian said OpenAI and Anthropic reported connector failures.