Rename a domain controller using Netdom: Active Directory

Note: newname for computer must be full DNS - ie newname.yourcompany.co.uk

Create an additional new name for the server

netdom computername oldname /add:newname

Make the new name the primary computer name for that server

netdom computername oldname /makeprimary:newname

Reboot

Remove the old computer name

netdom computername  /remove:oldname

Rename a domain controller using Netdom: Active Directory