In one of my Labs training, I have encountered a very common issue “The local administrator account becomes the domain administrator” Which means I created a new Virtual Machine I didn’t set complexity, password and make it an issue when we run DCPROMO command.
“Currently, a password is not required for the local Administrator account. We recommend that you use the net user command-line tool with the /passwordreg:yes option to require a password for this account before you create the new domain; otherwise, a password will not be required for the domain Administrator account.”
In my case, in this window, I have set a password that’s not complexity:
The solution is:
Open Run as Administrator, and run the commands that appear below:
(סיסמה = just to blur my password )
net user Administrator <YourPassword> /passwordreq:yes
Hope this information is useful for you