The Book

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** How to Properly Rename an Active Directory Domain Controller **


https://www.dell.com/support/kbdoc/en-us/000226230/windows-server-how-to-properly-rename-an-active-directory-domain-controller

  hostname
  
...checks current hostnme...

1. At an elevated command prompt, type //netdom computername <oldname> /add:<newname>//. The output should indicate that the new name was successfully added as an alternate name for the DC.
    netdom computername dc2.ad.domain.com /add:newdc2.ad.domain.com
{{ :microsoft:server:DC-rename-1.jpeg?700 }}    

    
2. To confirm that the new name was added, type netdom computername <oldname> /enumerate. Both names should be listed in the output.
    netdom computername dc2.ad.domain.com /enumerate
{{ :microsoft:server:DC-rename-2.jpeg?700 }}      
    
3. Type netdom computername <oldname> /makeprimary:<newname> to set the new FQDN as the DC's primary name. The output should indicate that this was successful. It will also indicate that a reboot is necessary.
    netdom computername dc2.ad.domain.com /makeprimary:newdc2.ad.domain.com
{{ :microsoft:server:DC-rename-3.jpeg?700 }}    
    
4. Reboot the DC.

  shutdown -r -t 0   
 
5. Launch an elevated command prompt and type netdom computername <newname> /remove:<oldname> to remove the old FQDN from the DC's list of names.
    netdom computername newdc2.ad.domain.com /remove:dc2.ad.domain.com
{{ :microsoft:server:DC-rename-5.jpeg?700 }}    
    
6. Confirm that the old name has been removed by typing netdom computername <newname> /enumerate. The new FQDN should be the only name listed in the output. The DC has now been renamed.
    netdom computername newdc2.ad.domain.com /enumerate
{{ :microsoft:server:DC-rename-6.jpeg?700 }}    

7. Reboot the DC.
<code> 
  shutdown -r -t 0   
</code>
Summary
<code>
hostname
netdom computername <old> /add:<new>
netdom computername <old> /enumerate
netdom computername <old> /makeprimary:<new>
shutdown -r -t 0 
netdom computername <new> /remove: <old>
netdom computername <new> /enumerate
shutdown -r -t 0 
</code>