When someone logs into an account, even if they sign out, the Office installation on a Mac will keep that connection. Use the tool from the page below to remove licenses.


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