Microsoft Office 365 investigated an outage Saturday that left tens of thousands of users unable to access Outlook, according to an outage tracker. "We're investigating an issue in which users may be unable to access Outlook features and services,

Thousands of Microsoft 365 customers have reported issues with services like Outlook. The company said Saturday in a series of posts on the social platform X that it was investigating the issue, which affected various Microsoft 365 services.

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.