Microsoft restored Microsoft 365 services after more than 24 hours of worldwide disruption affecting Outlook, Teams, Exchange Online, Copilot and other applications. The company attributed the incident to an issue introduced during a network capacity upgrade, rather than a cyberattack or artificial intelligence agents. Services were restored gradually after the underlying problem was fixed, with stability checks between each stage. Government agencies in Japan, Singapore and the United States experienced email problems, while the Microsoft 365 connectors for ChatGPT and Claude were also affected and subsequently restored. Microsoft apologized and said it would publish a full post-incident report once its review is complete.
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