The disruption, which has been resolved at the time of writing, was mainly contained to the New York, Chicago, and Los Angeles areas.

Microsoft Outlook, 365 and other services crashed Saturday, affecting tens of thousands in the United States and millions globally before services were restored in less than an hour.

We’ve identified a potential cause of impact and have reverted the suspected code to alleviate impact,” Microsoft said in the posts, which were published by a company page