Why Microsoft Is Down: Outage Extends Past 20 Hours As Services Recover

A major technical failure has impacted schools, healthcare systems, businesses, courts, and governments around the world. As users search for why Microsoft is down, the company has confirmed that the incident was not caused by any cyber-security threat and has issued an apology for the severe disruption.

Services including Teams, Outlook, and the artificial intelligence software Copilot experienced connectivity problems starting late Thursday. Customers reported missing access to calendar apps, failing to view certain files, and being unable to send or receive emails. While some users could still access messaging and meeting features normally, many others faced significant interruptions.

By Friday afternoon, Microsoft reported encouraging recovery progress in Europe and improvements in North America. The company explained that the ongoing disruption stemmed from an elevated load on its infrastructure caused by an earlier network capacity upgrade. An expert from the University of Reading noted that secure connection servers were overwhelmed, leading to a cascading effect as devices repeatedly tried to reconnect.

Microsoft is working to restore services after a massive global tech outage.

To manage the backlog, Microsoft extended its email timeout window to 48 hours to protect delayed messages. The company noted that email queues are significantly reduced and approaching normal levels, though some users might still experience intermittent access issues and delayed deliveries. A former software engineer suggested this could be one of the most disruptive business email outages ever recorded.

Why it matters

The prolonged disruption affects daily operations for schools, medical practices, and corporate offices globally that rely heavily on cloud communication tools. As services slowly return, the incident highlights the vulnerability of interconnected digital infrastructure and the immense technical challenges involved in managing widespread recovery processes.