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Outage · High impact16 sources

Microsoft outage gives customers a crash course in dependence on Redmond

The Register · By Richard Speed ·

Microsoft outage gives customers a crash course in dependence on Redmond

The Brief · written from 16 sources

  • Microsoft 365 services, including Outlook, Exchange Online and Teams, went down starting Thursday, 12 November 2026, and the disruption lasted more than 12 hours.
  • Some reports say the outage stretched to nearly 24 hours; Microsoft says it is gradually restoring service.
  • The outage disrupted government offices, traders and businesses globally, and some workers in Japan reportedly switched to fax machines.

Why it matters

Organizations that depend on Microsoft 365 for email and chat lost access for most of a working day, which shows the operational risk of relying on a single cloud vendor.

Who’s affected

  • Organizations running Microsoft 365 or Exchange Online
  • IT teams whose staff depend on Outlook and Teams

Microsoft 365 services are slowly recovering from a prolonged outage that has handed critics of single-vendor dependence a particularly unwelcome case study. Ever wondered what it would be like if your IT supplier abruptly pulled the plug? Perhaps the result of a mood swing by an…

Read the full story at theregister.com ↗

Timeline

  1. Outage begins; Outlook stops opening on Thursday lunchtime

  2. Microsoft says it is making progress and services begin gradually recovering

  3. Hacker News: Front Page

    Microsoft Outlook/365 still down after 12 hours

  4. Hacker News: Front Page

    Global Microsoft Outage

  5. www.theregister.com - Articles

    Microsoft's massive M365 outage stretches past 12 hours as its fixes keep failing

  6. www.theregister.com - Articles

    Microsoft's massive M365 outage stretches past 15 hours as its fixes keep failing

  7. www.theregister.com - Articles

    Microsoft's massive M365 outage stretches past 20 hours as its fixes keep failing

  8. Bloomberg Technology

    Microsoft Outage Gums Up Markets, Forces Traders to Use Phones

  9. Bloomberg Technology

    Microsoft Struggles to Restore Access to Software

  10. Tech | The Verge

    Microsoft’s massive Outlook outage continues

  11. Latest from Tom's Hardware

    Japanese workers return to fax machines during ongoing Microsoft 365 outage

  12. TechCrunch

    Microsoft’s latest email outage turned into a full blown global cloud crisis

  13. SecurityWeek

    Microsoft Struggles to Restore Email and Other Services in a Global Outage

  14. DEV Community: backend

    The health check that took down Outlook: inside the Microsoft 365 outage of November 12

  15. Bloomberg Technology

    Microsoft Says Making Progress Fixing One of Its Longest Outages

  16. GeekWire

    ‘A huge pain in the ass’: Microsoft 365 starts to recover after a day of global email turmoil

  17. www.theregister.com - Articles

    Microsoft outage gives customers a crash course in dependence on Redmond

  18. Engadget - Technology News & Expert Reviews

    Microsoft services are returning after an outage took down Outlook, Teams and more

Full coverage · 16 sources

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