Microsoft is struggling to fix a global outage that has disrupted services for tens of thousands of users across 74 countries. Teams, Outlook, Copilot, Exchange Online, SharePoint, and Microsoft Defender XDR all went down due to what the company described as “connectivity problems.” After more than eight hours, Microsoft admitted that its fix is “not taking as expected.” The company initially reported “positive results” from its recovery efforts before walking that assessment back.
We’re aggressively pursuing all pathways to reduce impact. We’ve paused all deployments, we’re moving additional traffic off the affected infrastructure, and we’re restarting affected servers to return them to service. More info under EX1550543 and MO1550821 in the Microsoft 365 admin center, as well as https://t.co/pYdahqxDv3 if the admin center is not available to you.
— Microsoft 365 Status (@MSFT365Status) November 12, 2026
This is at least the fifth major Microsoft 365 outage in 2026 alone.
Microsoft attributed the outage to “a large number of servers being unexpectedly unavailable.” In a follow-up post on X for users locked out of the admin center, the company said its infrastructure is “experiencing elevated load across multiple regions.” It added that it paused all deployments, redistributed traffic across its global infrastructure, and began restarting servers. However, those manual restarts progressed slower than expected, which is why the recovery timeline kept slipping.
Outlook complaints peaked at nearly 140,000 reports around 18:00 GMT on Thursday, according to the BBC. That figure represents more than 2,000 times the normal level of complaints. ABC News reported that nearly 130,000 users also filed reports on Downdetector around 1 p.m. Eastern Time. The affected services include Exchange Online, Microsoft Teams, SharePoint Online, Microsoft Copilot 365, Microsoft Defender XDR, Microsoft Planner, Microsoft To Do, and Microsoft Intune. Notably, personal Microsoft accounts remained largely unaffected, while enterprise and work accounts bore the worst impact.
The disruption cascaded quickly across sectors and countries. In Australia, Service NSW urged customers to delay visits and complete transactions online. Northern Territory government services went down entirely. Hospitals reported clerical issues but confirmed patient care stayed intact. Some medical facilities returned to paper prescriptions as a temporary workaround. Schools reported students unable to access lessons through Teams, while staff lost incoming and outgoing email access. In India, more than one lakh (100,000) incidents appeared on Downdetector. Users across the Netherlands, Poland, France, Sweden, and Latin America also reported failures.
The scale of exposure is staggering. More than 430 million people use Microsoft 365 apps globally. Over 90% of Fortune 500 companies rely on Copilot. Between three and four million companies run their operations on the platform. Because the outage hit email, video conferencing, file sharing, security tools, and AI assistants simultaneously, affected businesses effectively lost an entire working day.
Cybersecurity expert Troy Hunt warned that the impact extends far beyond Microsoft’s direct users. Because Microsoft forms a massive part of the internet backbone, the disruption affected account verification, purchase confirmations, appointment communications, and third-party services. Paul Spain from New Zealand-based Gorilla Technology pushed harder. He said that if this is not a cyber-attack, the outage reflects “incredible incompetence” that will cost millions in economic losses. Microsoft has stated the outage is unlikely to result from malicious activity.
Microsoft’s outage record in 2026 makes this incident part of a pattern rather than an exception. In January, a 10-hour outage disrupted Exchange Online, Teams, and Outlook due to elevated service load during maintenance. In July, a network failure in the West US region knocked out Azure and Microsoft 365 services. In August, Exchange Online problems spread to Teams, SharePoint, and Defender. In September, US and UK users faced five hours of intermittent failures with SSO errors.
Each incident follows a similar pattern. Microsoft identifies the problem, announces positive recovery signals, then extends the timeline after fixes take longer than expected. For enterprise customers who depend on Microsoft infrastructure for daily operations, these recurring outages raise serious questions about reliability and contingency planning.
