Engadget reports that multiple Microsoft 365 services went down on 12 November 2026, with early complaints centered on Outlook email and Microsoft flagging Exchange Online, Teams, SharePoint Online, Copilot 365 and Defender XDR as potentially affected for Business and Enterprise tiers. In a quoted statement, Microsoft said elevated load across multiple regions was likely causing connectivity errors and that it was restarting affected infrastructure, reviewing a traffic spike, and weighing rerouting options.