# Microsoft 365 outage disrupts email, collaboration and AI connectors

_Published Thursday, November 12, 2026 at 2:09 PM EST · Products · Latest · Tier 1 — Major_

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Microsoft 365 connectivity problems disrupted multiple services Thursday, with Microsoft identifying elevated infrastructure load across multiple regions, CNET reported. Its service alert named Exchange Online, Teams, SharePoint Online, Copilot 365 and Microsoft Defender XDR.

Microsoft said it was restarting and repairing affected infrastructure to restore capacity and investigating an unexpected increase in a specific type of traffic. It was also evaluating traffic redirection to alternate infrastructure. OpenAI and Anthropic reported problems with their Microsoft 365 connectors; Anthropic said mail, calendar and search tools were failing for most requests and new connections might not complete.

## Sources

- [CNET](https://www.cnet.com/news-live/microsoft-outlook-outage-11-12-2026/)

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Canonical: https://techandbusiness.org/newswire/PMvRI77MD9ELPArUn81ojT
Published: 2026-11-12T19:09:04.310Z
Story chronology: 2026-11-12T18:50:18.000Z
Retrieved: 2026-11-12T21:12:25.104Z
Publisher: Tech & Business (techandbusiness.org)