Hi@Bulletpencil ,
Thanks for your posting in Q&A.
I understand your request, and I check the local group policy, there is no the option of fifth week.
The principle of Microsoft designed is to make sure the client could be patched every month, because there aren't five Sundays every month.
So if we schedule updates to be installed on Sunday, October 31st, 2021, we could manually deploy update to the client.
Thanks for your understanding and have a nice day.
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