Widespread Microsoft 365 outage impacted Outlook and other services, leaving thousands of users locked out. Microsoft has since identified and reverted the problematic code.
Thousands of Microsoft 365 customers experienced issues accessing services like Outlook on Saturday. Microsoft acknowledged the problem on X, stating that various Microsoft 365 services were affected. The company identified and reverted a suspected problematic code change to mitigate the impact. While the outage peaked around 4 p.m. EST, with thousands of reports on Downdetector, Microsoft reported that most services were recovering later in the afternoon. This follows a similar outage experienced by Slack earlier in the week.
