Thousands of Microsoft users worldwide experienced widespread service disruptions on Thursday, November 12, 2026, as a major outage knocked core enterprise and consumer applications—including Outlook, Exchange Online, Microsoft 365, OneDrive, SharePoint, and Copilot—offline across multiple regions.
According to outage-tracking platform Downdetector, error reports surged across 74 countries and territories, logging more than 130,000 global user complaints—including over 39,000 reports in the United States alone—as desktop, mobile, and web connections stalled.
Scope of the Disruption & AI Connector Impact
Users and enterprise IT administrators reported varying degrees of connectivity failures across Microsoft’s cloud productivity ecosystem:
- Core Services Affected: Business and personal users reported being locked out of Exchange Online mailboxes, experiencing severe delays in sending or receiving emails, and facing timeouts across Outlook, OneDrive, SharePoint, and the Microsoft Store.
- Third-Party AI Integrations Disrupted: Beyond native Microsoft apps, the service degradation reportedly disrupted Microsoft data connectors utilized within third-party artificial intelligence platforms from OpenAI and Anthropic.
- User Frustration Online: Across social media and tech forums, professionals in the U.S., Canada, and beyond reported being unable to load web inboxes or sync accounts across desktop and mobile devices.
Microsoft’s Response & Traffic Rerouting
Microsoft acknowledged the incident via its official Microsoft 365 Status account on X, tracking the disruption under service incident reference EX1550543:
- Global Network Rerouting: While initially flagging connectivity issues across the Americas, Microsoft later confirmed that the overload could impact Microsoft 365 users in any region.
- Ongoing Mitigation: Engineers began redirecting internet traffic across Microsoft’s global network infrastructure to relieve server overload and restore normal service connectivity.
