Numerous users have complained that they are unable to access Microsoft services, such as Teams and Outlook, on a global scale.
More than 5,000 users in the UK reported that the email service Outlook was unavailable to them, according to website tracking service Downdetector.
It was also reported that other services, such as Teams and Xbox Live, were not working.
Microsoft stated that it is looking into the outage.
More than 280 million people use Microsoft Teams on a global scale, with most of them using it for calls, meetings, and organization in workplaces and educational institutions.