Microsoft said it is assessing "an issue impacting users attempting to us Exchange Online or functionality within Microsoft Teams calendar."

Microsoft said Monday it was investigating outages impacting its Microsoft 365 service, with thousands of users reporting issues with their Outlook, Exchange or Teams features. Microsoft 365 confirmed early Monday it was looking into an “issue impacting users attempting to access Exchange Online or functionality within Microsoft Teams calendar.

A Microsoft 365 problem is causing problems for businesses and workers. Downdetector.com, which allows users to report functionality issues with technology, showed the problems are largely affecting Outlook users. Exchange and Sharepoint were also being affected, according to the website.