Few weeks ago, I had to un-join and rejoin one of my VM to our domain. Unjoin from the domain, checked. Rejoin to the domain, failed?? I know some of you may feel like " heh? is it that hard? " So no, it is not hard at all, but this was my first time I got below error (no screenshot, I forgot to capture one!) Issues : ERROR : The domain controller does not meet the version requirement for this operation. But before the error prompted, I needed to key in my Domain Admin credential, which (1) I am pretty sure it was correct, and (2) it means my VM was connected to the network, and able to talk to Domain Controller. Troubleshooting :  I tried to join to domain using command line as below :