@Vlad1310 yes, these issues have already been fixed with the March 2024
Security Update. See:
https://learn.microsoft.com/exchange/plan-and-deploy/post-installation-tasks/security-best-practices/exchange-serialization-payload-sign?view=exchserver-2019#exchange-server-2016-cu23--2019-cu13-or-cu14--ma...
This is problem
https://techcommunity.microsoft.com/t5/exchange-team-blog/released-march-2024-exchange-server-security-updates/bc-p/4084046/highlight/true#M38191
is fixing in HU or not?
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