How to Upgrade Domain Controllers from Windows Server 2012 to 2022

Question

-> We need to migrate Domain Controllers from Windows 2012 to 2022 (total 4 VM's).

-> In which three DC's are hosted in VMware environment and one is on physical server.

-> Our target migration platform is Nutanix. (Upgrade DC and migrate from VMware to Nutanix)

My query is;

-> How do I intend to upgrade?
-> Which prerequisites do I need to be aware of?
-> Detailing the upgrade process
-> The last time we upgraded, some of the policies stopped operating as a result. I must therefore consider this alternative this time.

To upgrade successfully, we need your assistance/support.

Answer 1

The two prerequisites to introducing the first 2019 or 2022 domain controller are that domain functional level needs to be 2008 or higher and older sysvol FRS replication needs to have been migrated to DFSR

I'd use dcdiag / repadmin tools to verify health correcting all errors found before starting any operations. Then stand up the new 2019 or 2022, patch it fully, license it, join existing domain, add active directory domain services, promote it also making it a GC (recommended), transfer FSMO roles over (optional), transfer pdc emulator role (optional), use dcdiag / repadmin tools to again verify health, when all is good you can decommission / demote old one.

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