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.

Higher than normal U.S. outage reports began as the workday kicked off on the East Coast and peaked hours later in the early afternoon before tapering off, according to the tracking site Downdetector. Worst hit was the web version of Outlook, with the phone and desktop apps faring better, the site said.