Microsoft Global Outage Hits Outlook, Exchange, Teams and More; The company blames “recent change”.

A massive outage at Microsoft has crippled Microsoft 365, affecting global users of Teams, Outlook and Exchange emails, calendars and more.

The Downdector website showed reports of outages that had begun bubbling overnight into a gigantic surge starting around 10 p.m. 8 this morning up to 4,350 complaints, most around the Exchange. Microsoft has provided updates on X, formerly Twitter, during the morning, saying it “identified a recent change” that it believes is causing the issue and began “reverting to the change” while it “investigated what further actions is required.”

The tech giant said it has “begun implementing a fix” and, in the meantime, is “initiating manual reboots on a subset of machines that are in an unhealthy state.”

As of around noon ET, it said, the fix had reached about “98% of our affected environments.”

The problems today follow a meltdown in July after a corrupt update by a cybersecurity firm called CrowdStrike crashed systems and computers around the world running Microsoft Windows, including banks, airlines, trains, healthcare systems and other industries. A fix then also required devices to be restarted manually.

Microsoft hasn’t said what the “change” it identified today was that created the problems.

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