Microsoft Outlook down worldwide as M365 infrastructure buckles under load
tomwarren · x · 2026-11-13
Microsoft 365 suffered a global outage on Nov 12, cutting users off from Outlook email on web and apps, with Teams, SharePoint Online, and Microsoft 365 Copilot also affected. DownDetector reports spiked just before 1PM ET.
- Microsoft acknowledged elevated load across infrastructure in multiple regions was likely causing connectivity errors
- The company said it redistributed connection traffic worldwide, moved traffic off affected infrastructure, and restarted servers, while investigating whether the surge reflected genuine demand growth or a routing shift
- No clear ETA for full restoration; even Microsoft's own status pages were intermittently failing to load
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