Microsoft is suffering an outage that is affecting Outlook, Teams, and Sharepoint that has lasted for several hours. They have updated on the X platform about resolution efforts. They will update as they work through the issue to bring services back to a fully operational state.
There are many reports on DownDetector.com as well as people noticing it in their enterprise this morning as they logged in, like myself. They’ve been deploying a fix but it has been slow going and having delays.