Microsoft global outage disrupts Outlook and Teams for millions of users

A global Microsoft service outage began on Thursday, November 12, 2026, disrupting essential digital tools for users worldwide. The technical failure impacted access to Outlook, Teams, SharePoint, and Copilot, which prevented users from managing emails, files, and calendars. Downdetector recorded reports of the disruption from 74 countries within approximately one hour of the initial outage.

Scope of service disruption

The outage affected a massive user base, as Microsoft reported that over 430 million people use Microsoft 365 applications. The disruption extended beyond standard productivity software to include Microsoft connections to OpenAI's ChatGPT and Anthropic's Claude. These connections are vital for users relying on integrated artificial intelligence features within the Microsoft ecosystem.

Specific technical impacts were noted regarding the Exchange Online infrastructure. While the full extent of the infrastructure failure is still being analyzed, Microsoft took steps to mitigate communication failures. The company extended the email delivery timeout to 48 hours to prevent messages from bouncing back to senders during the period of instability.

Microsoft stated on Friday, November 13, 2026, that the company was seeing "encouraging progress" in restoration. Despite the scale of the disruption, Microsoft reported no signs of malicious activity related to the outage, suggesting the event was a technical failure rather than a cyberattack.

Service level agreements and uptime

Microsoft maintains a service level agreement that promises 99.9% uptime for its enterprise services. Under this agreement, the maximum allowed downtime is approximately 43 minutes per month. This outage significantly exceeds the monthly threshold established by the company's standard uptime guarantees.

The financial implications for enterprise clients depend on the duration and severity of the downtime. Service level agreement credits for downtime range from 25% to 100% of the monthly subscription fee. These credits are provided to customers when the company fails to meet its promised uptime standards.

Impact on global digital workflows

The disruption occurred during a period where some users utilized the digital disruption as an excuse for taking a break from work. The scale of the outage was evident as reports flooded in from multiple continents simultaneously. The inability to access SharePoint and Teams hindered collaborative environments that rely on real-time file sharing and communication.

As restoration efforts continue, the company remains focused on stabilizing the Microsoft 365 suite. The interruption of AI-driven tools like Copilot and the loss of access to external AI models like Claude and ChatGPT represent a significant shift in how the outage affected modern digital workflows. Microsoft continues to work toward full service restoration across all affected platforms.

Glossary

• SharePoint — SharePoint is an enterprise product and service associated with Microsoft 365. It is one of the services included in the Microsoft 365 product family.
• Copilot — Copilot is a generative artificial intelligence chatbot developed by Microsoft AI. It utilizes the Microsoft Prometheus model and features a conversational interface style similar to ChatGPT.
• Microsoft 365 — Microsoft 365 is a product family of productivity software, collaboration, and cloud-based services owned by Microsoft. It encompasses various online services, programs, and enterprise products.
• Anthropic's Claude — Claude is an AI model developed by Anthropic. It has been the subject of legal claims regarding the use of copyrighted song lyrics in its output.
• Exchange Online — Exchange Online is Exchange Server delivered as a cloud service hosted by Microsoft. It is built on the same technologies as on-premises Exchange Server.