Massive Microsoft 365 outage disrupts Outlook, Teams, Copilot worldwide
A widespread outage is impacting multiple Microsoft 365 services globally, including Outlook, Microsoft Teams, SharePoint Online, Copilot, and Microsoft Defender XDR, resulting in connectivity issues for many users. The incident began on November 12, 2026, with initial reports of Exchange Online mailbox connectivity problems in the Americas. Microsoft identified that server unavailability, not increased traffic load, is causing elevated infrastructure strain. To mitigate, Microsoft has paused deployments, redistributed traffic, and is restarting affected servers. A separate Teams outage earlier on the same day in the Americas was resolved and attributed to infrastructure resource contention. The current incident remains unresolved, with Microsoft not confirming any link between the two disruptions.
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Massive Microsoft 365 outage disrupts Outlook, Teams, Copilot worldwide
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A widespread outage is impacting multiple Microsoft 365 services globally, including Outlook, Microsoft Teams, SharePoint Online, Copilot, and Microsoft Defender XDR, resulting in connectivity issues for many users. The incident began on November 12, 2026, with initial reports of Exchange Online mailbox connectivity problems in the Americas. Microsoft identified that server unavailability, not increased traffic load, is causing elevated infrastructure strain. To mitigate, Microsoft has paused deployments, redistributed traffic, and is restarting affected servers. A separate Teams outage earlier on the same day in the Americas was resolved and attributed to infrastructure resource contention. The current incident remains unresolved, with Microsoft not confirming any link between the two disruptions.