Q&A forums are currently English language only.
Patch all the domain controllers as first step. Then each user will get the new improved authentication information PACs of Kerberos Ticket-Granting Tickets. (TGT) described in the KB
Then it looks like you may get one warning for every user.
Adds the new PAC to users who authenticated using an Active Directory domain controller that has the November 9, 2021 or later updates installed. When authenticating, if the user has the new PAC, the PAC is validated.
the PacRequestorEnforcement registry value's only function is to allow you to transition to the Enforcement phase early. Otherwise not needed.
--please don't forget to upvote
and Accept as answer
if the reply is helpful--