In some situations the end-user can receive the following error message when opening Microsoft Office: Microsoft Office can’t find your license for this application. A repair attempt was unsuccessfull or was cancelled. Microsoft Office will now exit. and after that the Office application is closed.
The issue described above is shown in the image below.
This issue may be related to the Software Protection service. In order to check if that is your situation, just check the Software Protection service using services.msc, in the example below we can see that the service is listed as stopping, and easy solution could be starting the service (if possible) or even restarting the machine. As soon as that service is listed as running the Office application should open just fine.