Question: how to change domain controller name on server 2012 r2?
Answer: Step 1: Getting ready. Open a command prompt. ( ...  Step 2: Adding an alternate computer name. ...  Step 3: Make the new name the primary. ...  Step 4: Reboot the server. ...  Step 5: Check new server name. ...  Step 6: Remove old hostname. ...  Step 7: Paranoia. ...  Step 8: Clean up.