Microsoft has seen a number of its services go down in the last 24-hours, including Microsoft Teams, Office 365, Xbox Live, OneDrive, Azure, Skype, and Bing.
Here's the status update on MSFT365
"We’ve successfully resolved the issue that was causing residual impact for SharePoint Online and we’ve confirmed that all Microsoft 365 services have returned to a healthy state. Additional details can be found via MO248163"