Microsoft Global Outage Hits Outlook, Exchange, Teams & More; Company Blames “Recent Change”

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

The Downdector website showed reports of outages starting to bubble overnight into a giant spike starting at about 8 am this morning up to 4,350 complaints, most around Exchange. Microsoft has been providing updates on X, formerly Twitter, throughout the morning, saying it “identified a recent change” that it thinks is causing the problem and started to “revert the change” while “investigating what additional actions are required.”

The tech giant said it’s “started to deploy a fix” and meanwhile is “beginning manual restarts on a subset of machines that are in an unhealthy state.”

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

The issues today follow a July meltdown after a corrupted update by a cybersecurity firm called CrowdStrike crashed systems and computers around the world that were running Microsoft Windows, including banks, airlines, trains, health systems and other industries. A fix then also required devices be manually rebooted.

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

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