Is Microsoft Down? Inside the Global Outlook and Microsoft 365 Outage That Took Email Offline for Ten Hours
On 12 November 2026 Exchange Online lost capacity for about ten hours, taking Outlook and Microsoft 365 mail for users in every region and calendar, and parts of Teams, SharePoint, Copilot and Defender with it, and breaking the AI connectors that depend on them. This episode walks the outage hour by hour from Microsoft’s own updates, covers who was hit from county sheriffs to AI providers, explains why one Exchange fault reaches so far, puts a cost on the day for a typical firm, and gives seven changes to make before the next one.
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