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I haven't seen anything with slow updates either.
BillyScott as katos pointed out yes Kerberos signing is enforced in this round of updates.
I can also come back after the AD updates last night and say that it had zero impact on our business this morning. So far everything is business as usual.
There are reports of potential issues with WHFB due to an end user prompt allowing for deletion, see screenshot below
WHfB