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Worldwide Microsoft 365 Outage Affects Outlook, Teams, Copilot

Worldwide Microsoft 365 Outage Affects Outlook, Teams, Copilot

Thairath•International•38m ago

Reader Briefing

A major Microsoft 365 outage affected users in 74 countries, disrupting email, collaboration tools, and AI services.

  • •Microsoft 365 services experienced a wide-scale outage affecting hundreds of thousands of users across 74 countries.
  • •The disruption impacted Outlook, Microsoft Teams, and Copilot, with Exchange Online being a primary point of failure.
  • •The outage occurred on a Thursday and affected users in the US, Japan, Singapore, UK, and Australia.
  • •The cause was identified as abnormal processing loads on servers within the infrastructure across multiple regions.

Overview

  • •Microsoft 365 outages affected hundreds of thousands of users across 74 countries, including the Americas, Europe, Asia, and Africa.
  • •Downdetector reported Outlook usage issues in the US peaking at over 138,000 cases on Thursday afternoon before dropping to 34,000-37,000 in the evening.
  • •Microsoft stated the cause was abnormal processing loads on some servers in infrastructure across several regions, leading to connectivity issues.
  • •The outage disrupted Outlook, Microsoft Teams, and Copilot, with some users unable to open certain file types or view calendar data.
  • •Microsoft stopped additional system installations, moved traffic away from affected servers, and began restarting servers.
  • •OpenAI and Anthropic experienced connection problems with Microsoft services, causing some tools to malfunction.
  • •Workhorse Group postponed its Q3 earnings report from November 12 to November 16 due to the Microsoft outage.
  • •Microsoft warned that system recovery was not proceeding as expected and some servers might fail again as usage increases.

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Key Entities

Organization

Microsoft(ไมโครซอฟท์)ℹ️
A provider of cloud and software services including Microsoft 365, Outlook, Teams, Copilot, and Azure.
Downdetectorℹ️
An online system problem tracking website.
OpenAIℹ️
An AI company that experienced connection issues with Microsoft services.
Anthropicℹ️
An AI company that confirmed connection problems affecting Microsoft 365.
Workhorse Groupℹ️
A US electric truck manufacturer that postponed its Q3 earnings report due to the outage.

Place

USA(สหรัฐฯ)ℹ️
A country where Outlook usage reports peaked at over 138,000 cases.
Japan(ญี่ปุ่น)ℹ️
A country where users reported service problems.
Singapore(สิงคโปร์)ℹ️
A country where users reported service problems.
UK(อังกฤษ)ℹ️
A country where users reported service problems.
Australia(ออสเตรเลีย)ℹ️
A country where users reported service problems.