Use this tool from Microsoft below.  You must run an Admin by Request session first, if on a faculty machine.

This will log out of all Microsoft apps, and allow you to log in with your UW account and add the license upon next app launch.

https://support.microsoft.com/en-us/office/how-to-remove-office-license-files-on-a-mac-b032c0f6-a431-4dad-83a9-6b727c03b193