Microsoft 365 services including Outlook, Teams and Copilot have been disrupted since November 12, 2026. News reports say the outage ran past 15 hours, and Anthropic and OpenAI reported that their Microsoft 365 connectors stopped working. We are following the recovery, Microsoft's account of the cause and what it means for teams that run support and operations through these tools.
Microsoft is holding delayed emails for up to 48 hours, and Anthropic and OpenAI said their Microsoft 365 connectors stopped working.
Our takeCustomer email, support queues and AI assistants that read Microsoft 365 data all went down together, and the cause is still unconfirmed. More of our take on Microsoft 365 outage runs into Friday as Microsoft rolls back a network change
Downdetector logged more than 130,000 Outlook reports at the peak, and Microsoft tied the failure to servers failing health checks, Marketing4eCommerce México reported.
Our takeAI assistants connected to company email and files inherit those systems' outages, so a Microsoft failure can stall support and operations work running through ChatGPT or Claude. More of our take on Microsoft 365 outage disrupts Outlook and Teams, and ChatGPT and Claude connectors