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Microsoft 365 Outage: Outlook, Teams and Copilot Down in Several Countries
In Short
A widespread Microsoft outage has disrupted email, workplace communication and cloud services, leaving users struggling to access essential tools across the globe.
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Microsoft 365 users across several countries have been facing problems accessing some of the company's most widely used services, including Outlook, Teams, SharePoint Online and Copilot. The outage, which began on Thursday afternoon in the US, continued for more than eight hours as Microsoft worked to bring its affected systems back online.
Users in the US, UK, Japan, Singapore and Australia were among those reporting connectivity issues. In India, the disruption began late Thursday night, affecting people who rely on Microsoft's services for everyday communication and work.
Which Microsoft services were affected?
The outage was not limited to Outlook. Microsoft's service status page first listed Exchange Online, Teams, SharePoint Online, Microsoft 365 Copilot and Defender XDR as platforms that were affected.
Because Exchange Online powers Outlook's email infrastructure, problems, with Exchange Online meant that many users could not sign in could not access Outlook inboxes could not send or receive Outlook emails. Some users also reported difficulties opening files and viewing Outlook calendar information.
Reports on Downdetector highlighted the scale of the disruption. Outlook-related complaints reportedly climbed to nearly 140,000 globally around 18:00 GMT on Thursday, equivalent to 11:30 pm IST. Interestingly, Microsoft's own status page also went offline briefly during the incident.
The company later narrowed down the affected features, focusing on services that depend on Exchange Online and email functionality.
What caused the Microsoft outage?
Microsoft first acknowledged the problem at 12:54 pm ET confirming that Exchange Online mailboxes in the Americas were having issues. The company later said that users in regions might also lose access to Microsoft 365 services.
Microsoft explained that its infrastructure was under load in several regions. Still the company made it clear that this issue was not due to a rise in user traffic.
Instead, several servers suddenly became unavailable making the other systems take on work. Microsoft said it had not found a reason for the problem and did not see any recent changes to the infrastructure that were directly linked to the issue. Microsoft also said that failed checks, for server health might be connected to a part of the system that watches over server health.
Is Outlook working again?
Microsoft has been working to bring services online but the process has not been easy. The big company tested a way to check if systems are healthy which let some affected servers start working again. It also started sending traffic to working systems as much as possible.
Microsoft said that some servers might stop working again when regular traffic comes back. To stop problems it limited the kinds of traffic going to servers that were fixed in some areas.
In its latest update on X, Microsoft said it is “seeing positive results” from restarting affected systems and is continuing to monitor their performance.
For now, there is no confirmed timeline for complete recovery. Users may continue to experience intermittent issues until Microsoft finishes restoring the affected services.
