Domain Controller Migration from Windows Server 2012r2 -> Windows Server 2019

  1. Prepare Existing AD forest for Server 2019 DC using Adprep command.
  1. Go to \support\adprep
  1. Add server to Domain Controller
  2. Install Active Directory Domain Services.
  3. Click on Promote this server to a domain controller.
  4. Select Add a domain controller to an existing domain. Provide credentials of Domain Controller and Select domain.
  5. DNS and GC should be selected. Site name :Default-First-Site-Name and provide DSRM password.
  6. Now select Replication from existing domain controller
  7. Now install ADC services.
  • Go to Active Directory User and Computers, click on Domain Controller we can see two domain controller on Active Directory User and Computers
  • Go to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\NTDS\Parameters
  • Go to DNS server and check Forward Lookup Zones. We can see two Active Directory- Integrated Primary Running.
  • Go to Active Directory Site and Services. In Site->Default-First-Site-Name-> Servers. We can see two server running.
  • Click on Windows server 2019 and right click on NTDS Setting- > All Task -> Check Replication. We can see automatically generated link, right clink on it and replicate now.
  • Same process on above point repeat on Windows Server 2012R2.
  • Go to DNS Manager on 2012R2 and 2019 and Check Forward Lookup Zones and Check First Zone and Second Zone, and check SOA number on, it should be same on both server. It shows that the all DNS record is replicated.
  • Transfer FMSO roles to Server 2019.
  • Go to Server 2019 and open PS as admin. Type ntdsutil
  • We want to manage roles so type roles



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