Updated:10:37 PM CET Nov,12
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Microsoft Outlook Down Worldwide as Servers Drop Offline - briefly|
| (hx) 10:28 PM CET - Nov,12 2026 | Microsoft Outlook and other Microsoft 365 services suffered a major outage on November 12, blocking users from email on the web and in apps.
The company first blamed elevated load across multiple regions and began redistributing traffic, then said the load came from a large number of servers becoming unexpectedly unavailable rather than a surge in real traffic.
Affected services include Exchange Online, Teams, SharePoint Online, Copilot, and Defender XDR, with impact spreading beyond the Americas.
Downdetector recorded a peak of nearly 130,000 Outlook problem reports, far above normal levels.
Microsoft is restarting affected servers, has paused deployments, and is testing workarounds while it investigates why the servers failed automated health checks.
The company's service status page itself had trouble loading for some users during the incident.
No official statement has linked the outage to a cyberattack or external intrusion.
Microsoft 365 status page: https://status.cloud.microsoft/
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