NEW YORK– Thousands of Microsoft 365 customers worldwide reported problems with services such as Outlook and Teams on Monday.

In social media posts and comments on platforms such as downdetector, the outage tracker, some said they were having trouble seeing their emails, loading calendars or opening other Microsoft 365 applications such as Powerpoint.

Earlier today, Microsoft acknowledged “an issue impacting users attempting to access Exchange Online or functionality within the Microsoft Teams calendar.” In updates posted to .

Microsoft shared that it was deploying a fix – which reportedly reached approximately 98% of “affected environments” shortly before noon ET.

Still, the company’s status page later added, the targeted restart was “slower than expected for the majority of affected users.”

As of Monday afternoon, Downdetector showed thousands of outage reports from users of Microsoft 365, especially Outlook.