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BackMicrosoft confirms global outage resolved, rules out cyberattack
Microsoft confirms global outage resolved, rules out cyberattack
Developing
Cointelegraph9 minutes agoTech1 min read

Microsoft confirms global outage resolved, rules out cyberattack

Global outage disrupts Outlook, Teams and other applications for more than 24 hours.

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Quick Look

Microsoft restored Microsoft 365 services after a global outage disrupted Outlook, Teams and other apps for over 24 hours, clarifying the issue was not a cyberattack.

AI-generated summary

Why It Matters

An outage began Thursday, disrupting access to Exchange Online mailboxes and features linked to Outlook, Teams and Microsoft Copilot.

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Microsoft said it had restored Microsoft 365 services after a global outage disrupted Outlook, Teams and other applications for more than 24 hours, reiterating that the disruption was not caused by a cyberattack.

On Saturday, the company said it had “restored service to the remaining impacted customers and regions,” directing customers to incident MO1550821 in the Microsoft 365 admin center.

On Friday, Microsoft said that the outage stemmed from a problem introduced during an earlier network capacity upgrade that emerged after a recent network change. “This was a technical issue not related to cyber or AI/agents,” the company said.

The company said it had addressed the underlying issue and restored services gradually, checking stability before proceeding to the next stage. Microsoft apologized for the disruption and said it would publish a full post-incident report once its review is complete.

The outage began Thursday, disrupting access to Exchange Online mailboxes and features linked to Outlook, Teams and Microsoft Copilot. Government agencies in Japan, Singapore and the United States experienced email problems, while connections between Microsoft 365 and AI assistants were also affected.

OpenAI said the Microsoft 365 connector in ChatGPT was operating normally again, while Anthropic also marked its Microsoft 365 connector and Claude for Outlook incident as resolved.

What to Watch

AI outlook — possibilities, not facts

  • Microsoft will publish a full post-incident report once its review is complete.

    Very likely · Within weeks

Open Questions

  • What were the exact technical details of the network capacity upgrade failure?

Related Topics

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This article was originally published by Cointelegraph.

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