The disruption hit core platforms including Outlook, Teams, and Copilot after offline servers failed automatic health checks. Overburdened operational infrastructure struggled to cope, leaving users across all regions unable to access basic email functionality during peak afternoon hours. To resolve the issue, technicians tested infrastructure configuration changes and rebooted services, though a definitive completion timeline was not shared.
Key points
Microsoft services including Outlook, Teams, and Copilot suffered major disruptions that…: Microsoft services including Outlook, Teams, and Copilot suffered major disruptions that affected users in all regions.
Technicians deployed configuration changes and restarted systems to redistribute elevated…: Technicians deployed configuration changes and restarted systems to redistribute elevated traffic loads across company infrastructure.
The company confirmed recovery efforts were underway but withheld a specific timeline for…: The company confirmed recovery efforts were underway but withheld a specific timeline for full service restoration.
Sources checked by our analysis pipeline: 1
Microsoft says servers unexpectedly went offline, disrupting Outlook email, Teams, Copilot and other services.
Thousands of Microsoft users reported trouble accessing their email and connecting to work apps after a widespread outage hit Outlook and other services on Thursday.
Reports of problems with Outlook, the company’s email client, climbed to about 130,000 on the outage tracking site Downdetector shortly after 1pm Eastern Time (18:00 GMT), with some users saying emails weren’t being sent or received, while others couldn’t open their inboxes.
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By just before 3pm (20:00 GMT), that figure had fallen to about 77,000.
Users also reported having trouble accessing Microsoft’s workplace messaging app Teams and its AI assistant Copilot, along with other Microsoft 365 services. The company said…
Elevated infrastructure strain triggered broad connectivity disruptions across Microsoft 365 services on Thursday, spreading well beyond an initial investigation centered in the Americas. To stabilize the environment and restore access, engineers halted system deployments, rerouted network traffic, and restarted affected servers. The global incident degraded email and collaboration capabilities for tens of thousands of corporate and personal users.
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