Microsoft’s global outage and fixes: What we know

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Microsoft is reporting widespread improvements to its services after a global outage took them offline Thursday, disrupting communications and work ...

Microsoft is reporting widespread improvements to its services after a global outage took them offline Thursday, disrupting communications and work at schools, government agencies and offices around the world. The company, headquartered in Redmond, Washington, said Friday that it was seeing “encouraging recovery progress, with service availability and email delivery performance improving across a growing portion of affected infrastructure.”

“We remain focused on addressing residual impact and ensuring reliable service restoration,” the company added.

Outages started disrupting Microsoft tools and apps around noon ET on Thursday and quickly spread to more than 70 countries and territories, affecting millions of users, according to Downdetector, an outage-tracking site.

Some of Microsoft’s most popular products, including email manager Outlook, workplace messaging and video calling app Teams and artificial intelligence assistant Copilot, stopped working.

Microsoft said in a statement Friday that “for now, we can confirm that there is no indication this is the result of malicious or cyber activity.” It added that the problem was “a technical issue not related to cyber or AI” agents.

The company said it had no indication that a Federal Aviation Administration ground stop issued late Friday afternoon and affecting air travel nationwide was related to the outage.

The company has yet to provide a clear answer, although it has promised to make public a full report that identifies the “root cause” of the outage.

On Thursday, Microsoft said that a number of servers had unexpectedly shut down, straining the remaining infrastructure. On Friday, it said the problem had been introduced “during an earlier network capacity upgrade that surfaced following a recent network change.” It said it had addressed the underlying issue, allowing its tools and apps to begin to function normally again.

“Given the scale of demand, we restored services gradually, validating stability at each stage,” it…

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