Microsoft said it had fully restored services on Nov. 14 after a global outage disrupted Outlook, Teams, Copilot, and other Microsoft 365 tools for more than a day. (Foto: Instagram)
Microsoft said Saturday, Nov. 14, that it had fully restored services after a global outage disrupted several of its platforms. The interruption began Thursday, Nov. 12, and affected millions of users around the world, disrupting work at businesses and public agencies. Outlook, Teams, Copilot and other Microsoft 365 tools were among the services affected.
In a statement that morning, Microsoft said it had completed the work needed to address the underlying problem and restore access for customers and regions still experiencing instability. The company said it had restored service to the remaining affected customers and locations. Microsoft did not disclose how many users were affected. Downdetector, which tracks disruptions to digital services, recorded reports from more than 70 countries and territories, reaching 74 locations.
Microsoft attributed the incident to a technical failure in its network infrastructure. In an explanation on Friday, Nov. 13, the company said the issue arose during an earlier network capacity expansion and appeared after a recent configuration change. It ruled out a cyberattack and said the outage was not related to artificial intelligence systems or AI agents.
The recovery took place gradually as technical teams worked to fix problems involving servers and components of Exchange Online, which supports services including Outlook. The unavailability of some servers made it harder to restore network traffic and normalize email delivery. Even after initial repairs, some users continued to have trouble accessing inboxes, sending and receiving messages, and using communication tools.
The disruption extended beyond businesses and affected essential services in several countries. In the United Kingdom, it disrupted work at the National Health Service and hampered police communications, including the receipt of online incident reports. Courts were also affected: a trial in Manchester was temporarily halted because of delays linked to the unavailable systems. The National Pharmacy Association warned of possible delays in issuing and forwarding prescriptions as health professionals struggled to use communication tools. Governments in Japan, Australia and Singapore also reported effects on administrative operations.
Airlines encountered problems with customer service and passenger communications, while financial companies had difficulty accessing and sharing information. Some organizations relied on phone calls, paper documents and fax machines to keep certain operations running. The outage also affected connections between Microsoft 365 tools and AI platforms from other companies, including OpenAI and Anthropic.
The incident renewed concerns about how heavily governments, businesses and public institutions rely on a small number of major technology providers. Microsoft says more than 430 million people use its applications. Microsoft 365 includes tools for administrative work, business communications, file storage and scheduling. A disruption to infrastructure used at that scale can spread across industries, including organizations that depend on integrations with Microsoft services. The outage lasted more than a day.
