Overview
Microsoft 365 services, including Outlook, Microsoft Teams, and Copilot, have experienced a significant outage affecting users worldwide. The incident began on Thursday at 1:26 PM ET and has been ongoing since then. Users have reported issues accessing these services, including problems with Outlook. According to Downdetector, complaints surged across multiple Microsoft services, including Outlook, Microsoft 365, Teams, Copilot, Azure, OneDrive, and the Microsoft Store.
Initial Investigation
Microsoft initially attributed the disruption to elevated infrastructure load across multiple regions. However, it has since determined that the problem was caused by servers unexpectedly becoming unavailable. The company has confirmed that customers may be unable to connect to multiple services, including Exchange Online, Microsoft Teams, SharePoint Online, Microsoft 365 Copilot, and Microsoft Defender XDR.
Service Impact
The outage has affected users in any region, not just the Americas. Microsoft has confirmed that Exchange Online mailbox connectivity problems were reported earlier in the day. The company has paused all deployments, redistributed connection traffic across its worldwide infrastructure, and is moving additional traffic away from affected systems to reduce load. The company is also restarting affected servers to restore capacity and return services to normal operation.
Previous Outage
Earlier in the day, Microsoft Teams experienced an outage for users in North and South America, causing delays or failures when sending messages, errors creating or updating conversations, and problems retrieving chat messages. The company attributed the earlier Teams disruption to resource contention within its infrastructure, which led to elevated resource utilization and prevented the service from processing messaging requests normally. The company has confirmed that the earlier Teams incident has been fully resolved.
Current Status
Microsoft has seen limited recovery from the widespread Microsoft 365 outage after successfully returning some affected servers to service. The company is investigating whether reverting a small number of recent configuration updates could accelerate recovery. Users may experience a gradual recovery as their applications reconnect. Microsoft has not yet confirmed when services will be fully restored.
Conclusion
The ongoing Microsoft 365 outage has disrupted multiple services, including Outlook, Microsoft Teams, and Copilot, affecting users worldwide. The company is working to restore services and is investigating potential causes and solutions to the issue. Users are advised to monitor the situation and may experience a gradual recovery as their applications reconnect.
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