When I run dcdiag I am still seeing the Windows Server 2008 that was replaced. Dcdiag recognizes the Windows Server 2008 as a DC. Dcdiag is also listing the Windows Server 2008 as a DNS that is not working and Ldap search capability attribute search failed .
What I did is reuse the ip address that was used on the Windows Server 2008 on the Windows Server 2019.
If power the Windows Server 2008 instead of the Windows Server 2019, then use dcpromo /forceremoval command, Windows Server 2008 wants to install a domain controller so Windows Server 2008 thinks there is no DC. I could not install the DC anyway because the level is Windows Server 2016.



