LONDON — A massive, lingering global Microsoft outage has entered its second day, leaving millions of users, businesses, schools, and government agencies grappling with widespread IT failures.
The technical breakdown—which began over 18 hours ago—has heavily impacted core Microsoft 365 services, most notably Exchange Online, leaving users unable to access their Outlook mailboxes, send or receive emails, or efficiently schedule meetings on Teams. Other ecosystem tools, including OneDrive, OneNote, Microsoft To Do, and Copilot 365, have also faced severe connectivity disruptions.
Global Impact on Essential Services
The disruption has triggered operational headaches worldwide:
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Healthcare & Public Services: In the UK, the National Health Service (NHS) and local police forces were forced to temporarily revert to paper records and manual administrative workflows.
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Education & Transport: Schools, universities, and exam inspectors across Europe, Australia, and Japan experienced administrative bottlenecks, while railway and airline passengers faced delays with digital tickets and email notifications.
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Financial Sector: Major banking institutions, including the Bank of England and various international securities firms, caught delays processing communications and transaction workflows.
Cause and Recovery Efforts
Microsoft has explicitly ruled out any cyberattack or malicious activity, explaining that the issue stems from a core server process becoming overwhelmed by an unexpected surge in specific service traffic. This sudden spike caused servers to stop processing requests and triggered connection timeouts globally.
While the tech giant reported “positive results for server stability” and “broader improvements” across North America, Europe, and Japan after deploying patches and restarting impacted infrastructure, full restoration has been uneven. Millions of users continue to experience residual connectivity errors as engineers race to normalize traffic capacity.