Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Sorry, I don't have that experience. ASK that question on the parallel business forum at the link I provided last time. They will have experience with WSUS and GPOs.
This site provides KB numbers for 365 monthly updates: https://blogs.technet.microsoft.com/office\_sustained\_engineering/2016/06/07/june-2016-non-security-office-update-release/
Take a look at this site: https://support.office.com/en-us/article/What-s-New-and-Improved-in-Office-2016-for-Office-365-95c8d81d-08ba-42c1-914f-bca4603e1426?ui=en-US&rs=en-US&ad=US
It provides ongoing information about monthly updates to Office 365. Unfortunately they are slow updating it, so the June updates are not there yet. Also unfortunate is that it does not provide KB links, it is generic user level carp.
Here are some more what's new type links for 365:
https://technet.microsoft.com/en-us/office/mt465751?f=255&MSPPError=-2147217396