بسم الله والحمد لله والصلاة والسلام علي رسول الله وآله وصحبه وإخوانه وسلم
Do you want to reinstall that domain?
I was creating a child domain, but the installation wizard poped up with the previous error message:
"Directory configuration information
indicates that the domain child.mydomain.com already exists. Do you want
to reinstall that domain? If you click Yes, all information about the
prior Active Directory Domain Services domain installation will be
deleted."
some search on the internet for this problem i have seen som solutions but they did not work.
finally i came across a thread in a forum, which stated that:
"This problem occurs when you are using cloned virtual machines that have the same SID".
I have mad a new virtual machine "clean installation" from the beginning.
Finally thanks to Allah it worked.
Hope that has been informative to you.
وصلي الله وسلم وبارك علي النبي وآله وصحبه وإخوانه وسلم