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A massive, hourslong Microsoft outage that began late Thursday has crippled essential workplace tools for millions of users across the globe, disrupting government agencies, healthcare systems, banks, and courts.
By Friday, November 13, the rolling disruption had stretched into its second day, leaving offices worldwide without reliable access to Outlook email, Microsoft Teams, and Copilot AI.
According to outage-tracking platform Downdetector, disruption reports surged across 74 countries and territories within roughly an hour of the failure beginning. As engineers scrambled to contain the fallout, Microsoft confirmed on Friday that traffic is “being gradually restored” and that it is seeing “additional progress toward recovery”. The tech giant noted improvements in mailbox access and delayed email processing, though intermittent issues persist as service capacity slowly returns to baseline.
Crucially, Microsoft executives moved quickly to quell fears of a coordinated digital attack.
Microsoft executive Charles Lamanna stated in the early hours of Friday that there is currently no indication the outage was caused by “malicious or cyber activity,” pointing instead to internal infrastructure and server stability issues.
The operational impact has been felt sharply across public institutions and critical services. In the United Kingdom, disruptions to the National Health Service (NHS) email network threatened to delay drug prescriptions and complicate communications between pharmacies, general practitioners, and patients. UK police departments also reported difficulties receiving online crime reports, while government engineers worked directly with Microsoft to establish contingency plans.
In the United States, the House of Representatives confirmed its users were impacted, prompting some congressional staffers to joke on social media about conducting official business via direct messages.
Municipal governments nationwide including major cities like Austin, Miami Beach, Jacksonville, and Pasadena, alongside Baltimore County warned residents of downed email servers and urged the public to contact local offices by telephone.
To prevent critical correspondence from bouncing permanently during the blackout, Microsoft announced early Friday that it had extended its email timeout window to 48 hours, giving mail servers extra time to hold and deliver delayed messages while recovery continues.
The disruption primarily targeted services tied to Microsoft’s Exchange Online infrastructure.
Beyond Outlook email, users experienced severe limitations with Microsoft Copilot, which could not load chats or pull data from calendars and files.
While basic standalone functions in Word, Excel, and PowerPoint remained operational, cloud-dependent features such as SharePoint file sharing, cloud printing, and viewing recently used documents, were impaired.
Similarly, while direct messaging and unscheduled calls on Teams largely continued functioning, scheduled meetings requiring calendar integration faced widespread errors.
As Microsoft continues scaling virtual machine capacity and rerouting traffic to stabilize its servers, the incident serves as a stark reminder of how heavily modern global infrastructure relies on centralized cloud providers.
Microsoft stated it will release a full post-incident report detailing the root cause once full mitigation is achieved.
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