Microsoft 365 Services Experience Widespread Outage, Affecting Outlook, Teams, and Other Services

Microsoft is actively investigating a widespread outage impacting multiple Microsoft 365 services, including Exchange Online, Outlook, Microsoft Teams, and SharePoint Online. The issue, which began on November 12, 2026, is attributed to a core process on affected servers becoming overwhelmed, leading to unresponsiveness and capacity loss. Microsoft is pursuing various recovery approaches, including isolating and restarting affected infrastructure, and analyzing traffic patterns.