Microsoft Says All Services Are Back Online After Global Outage Reported in 74 Countries
Key Facts
Microsoft said on Saturday, November 14, that all its products and services were back online after a global outage that began Thursday and continued into Friday, disrupting email, virtual meetings, cloud apps and work tools. The company said its service-status page showed the message "All products are operational," including Microsoft 365 services for businesses and enterprises and products aimed at consumers. The disruption centered on Exchange Online, the company's cloud email infrastructure, and then spread to services that depend on it. These included Outlook, Teams, Microsoft 365 Copilot, SharePoint Online and Microsoft Defender XDR. The recovery announcement came after more than a day of disrupted access and message delivery, and the company said it would publish a detailed report after completing its review of the incident.
Microsoft attributed the problem to a flaw introduced during an earlier network-capacity upgrade that surfaced after a subsequent network change. It said a number of servers unexpectedly became unavailable, putting additional pressure on the remaining infrastructure. The company said the outage was not caused by a sudden increase in user traffic. As servers were restored, engineers encountered another obstacle: some restarted servers became unresponsive again when traffic was routed to them. Teams therefore gradually restored capacity while monitoring its stability, according to the company's account of the recovery.
The outage's geographic impact spread quickly: Downdetector said it received reports from 74 countries and territories within about an hour of the disruption's start. The developments showed that services dependent on a single platform did not recover at the same pace across all regions or products. On Thursday, Microsoft said it had restored the health and functionality of Teams in North America, while some reports of connection problems continued. By Friday morning in North America, it said email queues had fallen substantially and were approaching normal levels, but warned that intermittent access issues and delayed message delivery could continue. On Friday, the company reported broader improvement in North America, continued improvement across large parts of Europe, and encouraging signs of recovery in Asia-Pacific.
Microsoft's commercial Microsoft 365 base reflects the scale of reliance on its services: the company said in January that it had more than 450 million paid commercial subscriptions to the service. That figure describes the subscription base and does not specify how many users were affected by the outage. In Britain, police said they were unable to receive crime reports online, while the National Pharmacy Association warned that access to medicines could be delayed because NHS email systems were affected. Air India said its flight operations were unaffected and that it temporarily rerouted email to ensure customer inquiries were received. IndiGo said email support was disrupted, while other support channels and flight operations remained available.
The company said there were no indications that the disruption resulted from malicious activity, specifically saying it was not related to a cyberattack or AI agents. In the early hours, Microsoft said the changes it had implemented to improve the service had not gone as expected, before later reporting improved stability and capacity. The company apologized to customers and partners, saying: "We deeply regret the disruption this incident caused our customers and partners." Microsoft shares had fallen more than 6% in premarket trading on Friday, then were down about 0.3% at 10 a.m. Eastern time. But they ended Friday's session up 0.2%, according to The Associated Press, while the company said its review of the incident would conclude with a detailed report.