Demoted DC unable to RDP after DNS change

Question

So we have demoted one of Windows 2012 R2 DC server and changed its primary DNS ip from loopback ip to DNS server IP.
Now we are not able to RDP of the server. It is in the network and RDP services seems running well for the server.
This is also our terminal licensing server.

Answer 1

May want to check for stale or incorrect records in DNS console. Also try ipconfig /registerdns on the problem DC and on problem member do ipconfig /flushdns or try to RDP the ip address instead of name. Also might try from PowerShell from source and target.

Test-NetConnection -ComputerName "192.168.49.142" -CommonTCPPort "RDP" -InformationLevel "Detailed"

--please don't forget to Accept as answer if the reply is helpful--

Answer 2

@Anonymous
I have tried PowerShell and it is showing
WARNING: TCP connect to (IP address : 3389) failed.

But when I am trying to run below command it is working.
Test-NetConnection -ComputerName "ComputerName" -Port "3389" -InformationLevel "Detailed"

Answer 3

I have tried PowerShell

From source or target? Try the ip address? Need to try on both.

Answer 4

Both Powershell run from source (my host machine)

Need to do two things try using the ip address

1. Test-NetConnection -ComputerName "192.168.49.142" -CommonTCPPort "RDP" -InformationLevel "Detailed"
2. also try running on the target machine (old domain controller

Answer 5

Issue Resolve: It turnout Domain Profile Setting Firewall was on, After setting it off i was able to RDP of server

@Anonymous Thanks a ton!!