Major Microsoft Outlook and 365 Service Outage in North America Due to Server Failures
On November 12, 2026, Microsoft experienced a significant service outage impacting Outlook and other Microsoft 365 services primarily across North America. The outage began around 10:40 am ET with issues initially reported in Microsoft Teams and later affecting Exchange Online mailboxes and other services such as SharePoint Online and Microsoft Defender XDR. Microsoft identified the root cause as servers failing automated health checks and going offline, resulting in elevated load and connectivity errors, not due to cyberattack or increased traffic. The company paused all deployments, redistributed traffic globally, and attempted server restarts to restore services. The incident caused widespread disruption to email and collaboration workflows, with recovery efforts ongoing as of the last update at 3:05 pm ET.
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Major Microsoft Outlook and 365 Service Outage in North America Due to Server Failures
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On November 12, 2026, Microsoft experienced a significant service outage impacting Outlook and other Microsoft 365 services primarily across North America. The outage began around 10:40 am ET with issues initially reported in Microsoft Teams and later affecting Exchange Online mailboxes and other services such as SharePoint Online and Microsoft Defender XDR. Microsoft identified the root cause as servers failing automated health checks and going offline, resulting in elevated load and connectivity errors, not due to cyberattack or increased traffic. The company paused all deployments, redistributed traffic globally, and attempted server restarts to restore services. The incident caused widespread disruption to email and collaboration workflows, with recovery efforts ongoing as of the last update at 3:05 pm ET.