Microsoft 365 Outage Disrupts Outlook, Teams and Copilot Worldwide for Hours
A major Microsoft 365 outage began affecting users from Asia to the United States, impacting Outlook, Teams, Exchange Online and the AI assistant Copilot. The disruption hit commercial customers, government operations and businesses including airlines, banks and hospitals, with Microsoft confirming more than 450 million paid subscriptions were potentially exposed. Engineers applied multiple recovery actions in phases while stating there was no indication of malicious activity and comparing the event to the 2024 CrowdStrike incident caused by a faulty update. Early stabilization was reported but service health remained variable with capacity not yet returned to baseline. British police forces, the National Health Service, Hong Kong banks, Air India, IndiGo, Singapore government and Japan’s IT infrastructure all experienced interruptions, forcing reliance on alternative communication methods. OpenAI and Anthropic also faced connectivity problems with Microsoft 365 tools, highlighting broader ripple effects across AI platforms.
SecurityWeekNov 13, 2026Translated from English