Millions of Microsoft users across the globe remain locked out of Outlook, Teams, Copilot, Exchange Online, SharePoint, and multiple security and admin tools as a widespread Microsoft 365 outage continues. The disruption, which began around 1:00 PM Eastern on Thursday, November 12, 2026, has lasted more than 17 hours and remains unresolved. Key services tied to Microsoft’s Exchange infrastructure are still degraded or inaccessible.
What’s Down and What’s Partly Working
The outage has taken down access to Outlook via web, desktop, mobile, and REST APIs, causing delays in email delivery and making calendars, teams messaging, and file syncing unreliable or unavailable. Tools like Copilot are failing to load or fetch critical work data. Other impacted services include SharePoint, OneDrive, Defender’s Safe Links, Planner, Microsoft To Do, Purview, and Intune.
Some features that do not depend on Exchange continue to function, though unpredictably. Microsoft is gradually restoring connectivity, especially in Asia-Pacific, but users in many regions still face intermittent failures.
What’s the Cause — and What Microsoft Is Doing
Microsoft has stated the outage is notlinked to any malicious attack. Executive Charles Lamanna clarified there’s no indication of cyberattacks, despite speculation—work is instead focused on fixes in network routing, capacity management, and server stability.
The company has initiated multiple recovery measures: redistributing traffic, restarting unresponsive servers, isolating faulty segments of its infrastructure, and rolling out patch fixes to authentication, routing, and capacity systems. Though there are early signs of stabilization, Microsoft warns these fixes haven’t yet resulted in full recovery.
Disruptions extend beyond Microsoft itself—external platforms that rely on its services are affected too. Integrations for AI firms like OpenAI and Anthropic are experiencing failures tied to Microsoft 365 connectors.
The outage has already disrupted hundreds of government and enterprise workflows. In Australia, Japan, and elsewhere, email communications ground to a halt for some agencies. Private sector organizations are also unable to send or receive emails or use collaboration tools that many rely on daily.
According to Microsoft’s service health entries, the incident is identified under advisories MO1550821 and EX1550543. The company has declared “service degradation” for multiple Microsoft 365 components and services—signaling widespread impact.
Several recovery steps have shown positive results in certain regions, particularly Asia-Pacific, but there’s no clear timeline for when full restoration will occur. Microsoft indicates it will detail the root cause and follow-up actions once systems are fully stabilized.
Why this matters:This outage exposes how heavily dependent organizations and individuals are on Microsoft’s cloud infrastructure. Anything tied to Exchange services—emails, calendars, AI assistants—now showcases the risk of a single point of failure. Watching how Microsoft handles this incident will be crucial: how fast they restore trust, how transparent they are with technical root cause, and what safeguards they build for resilience in future outages. The ripple effects across governmental, financial, educational, and AI sectors underscore that when cloud services fail, it’s not just an inconvenience—it’s a major disruption to essential digital fabric.
