Microsoft outage: what happened and when will it be fixed?

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Potentially millions of people were unable to access their emails, Teams chats or meetings on Thursday night and Friday morning after a Microsoft 365 outage brought down services…

Potentially millions of people were unable to access their emails, Teams chats or meetings on Thursday night and Friday morning after a Microsoft 365 outage brought down services across the globe.

The incident affected businesses, government agencies, and even Microsoft employees who were unable to email during the more than nine hours of downtime.

What happened and why – and what does it say about online services in 2026?

At around 6pm on Thursday, outage website Down Detector showed a spike in users reporting issues with Microsoft 365 – the suite of cloud software that includes Teams, Word Excel, PowerPoint and Outlook. There were nearly 130,000 reports at the time.

The outage has lasted for more than 12 hours at the time of reporting, with Microsoft working to bring services back online.

So far, the problem appears to be a configuration update which has resulted in some servers becoming overloaded and taken offline, Microsoft indicated.

When the company attempted to apply a fix, servers that had come back online again became unresponsive when traffic began returning to them.

As some servers went down, traffic was funnelled on to the remaining servers, causing traffic issues for those remaining online.

To understand what was bringing down the servers, the company began limiting the traffic that could reach affected servers in specific locations, and, on some servers, rolled back to an earlier software configuration to see if it fixed the problem.

Début de l'article, extrait de The Irish Times. Pour lire la suite, ouvrez l'article chez le média.