How to fix Microsoft Office 365 subscription and license problems

[WindowsCentral.com]

Being hit with a license error when you try to use Microsoft Office 365? There's an easy fix.
I have an Office 365 license, and it's still definitely valid and very much paid for, but Excel didn't seem to think that was the case when I went to open the app.
Fortunately, there's a really easy fix to the problem that doesn't involve contacting Microsoft and yelling at anyone on the phone.

Full story from the WindowsCentral blog...