Information

As of 8:53, it seems that a failure has occurred on the Microsoft side.

As a result, you will not be able to log in to various services such as Stream, OneDrive, and Teams.
※You can use it if you are logged in to the service.

We will add more information as it becomes available.
https://status.office.com/


[9:28 postscript]
I was able to confirm the login in this section.
It seems that the official restoration notice has not been issued yet.