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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.

SecurityWeekTranslated from English

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A widespread Microsoft 365 outage struck users across Asia, Europe and the United States, leaving Outlook, Teams, Exchange Online and the AI assistant Copilot unavailable for many hours.

The company stated the problem affected a broad range of Microsoft 365 offerings and confirmed it had more than 450 million paid commercial subscriptions at the start of the year. Recovery efforts progressed in measured phases as engineers worked to restore servers without any sign of malicious activity.

Recovery Efforts and Service Status

Microsoft posted several updates on X indicating that initial changes had not performed as expected. Later messages reported early stabilization and incremental capacity improvements, yet service health stayed variable and full baseline capacity had not returned.

The Redmond-based firm emphasized it was treating the incident with urgency and priority until complete resolution.

Impact on Governments and Businesses

The British government worked closely with Microsoft while activating contingency plans; police forces directed the public to use emergency lines instead of online crime reporting. The National Pharmacy Association warned of prescription delays due to National Health Service email failures.

In Australia, Home Affairs Minister Tony Burke noted Microsoft likened the event to the 2024 CrowdStrike outage caused by a faulty update. Hong Kong banks and aluminum firm operator Danny Lau reported lost customer communications that risked production timelines.

Air India rerouted email services while confirming flight operations remained unaffected; IndiGo experienced similar email disruptions. Singapore’s Government Technology Agency and the Philippines’ Supreme Court both reported operational impacts, and Japanese officials secured telephone backups.

Broader Ripple Effects

OpenAI and Anthropic each encountered connectivity issues with Microsoft 365 tools, illustrating how outages propagate through AI platforms that rely on the same infrastructure.

U.S.-based Workhorse Group Inc. postponed its quarterly earnings call because of the service interruption.

OpenAIAnthropicMicrosoft 365CrowdStrikeExchange OnlineAir India
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