Microsoft is investigating an issue with its Microsoft 365 service and its Teams app, with some users reporting to DownDetector that they are having problems using services such as Exchange and Outlook.

Microsoft said Monday that it has identified the cause of a major Outlook and Teams outage, and is deploying a fix to the problem.

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

Thousands of Microsoft 365 customers worldwide reported having issues with services like Outlook and Teams on Monday. In social media posts and comments on platforms like

Microsoft 365 users are experiencing issues on Monday with the free email service Outlook. Users began reporting that outage just before 8 a.m. ET, according to Downdetector. It appears most people are reporting problems when trying to use the website version.

Several Microsoft programs, including Outlook, Microsoft 365, and Teams, are experiencing outages, according to reports on Downdetector.

Microsoft Outlook and Teams went down, and the company’s response isn’t helping anything. On Monday, Microsoft suffered a widespread outage that affected Outlook and Teams. Reports started appearing early Monday morning,

An outage at Microsoft impacted thousands of online users on Monday as they attempted to use its Microsoft 365 service for emails, calendars and other 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.

Microsoft said it's working to restore many programs after an outage Monday, but said progress has been slower than expected.

Microsoft is working to fix an issue with Outlook and Teams following an apparent outage early Monday. Users began reporting issues with Microsoft platforms around 8 a.m. Monday, according to Down Detector.