Good day, hope you guys are having a good weekend. This blog post is about active directory portion. My situation was the environment contains Windows Server 2008, and would wish to upgrade to Windows Server 2008 R2, by setting up new VMs with Windows Server 2008 R2 Operating System. The environment contain a parent domain and 2 child domains. Due to Microsoft has stop supporting pushing updates to legacy servers, the environment had to use a third-party product to support the pushing of windows update to the legacy servers and the product is also served as Anti-virus/malware.
Before you are going to prep domain and forest you have to make sure your account has the proper permissions to perform the prep.
While I was about to prep a child domain using the command prompt in elevation mode, I receive an error saying “Access is denied”, there was no log to refer to, to know about details what caused this issue. Same goes to event viewer logs.
After long research there was no resolution and the next try was to disable the third-party product and re-run the adprep command and was able to run successfully.
If you have other issues with adprep, you may refer the logs from this path “C:\Windows\Debug\adprep\”.
References:
Sabrina Kay's Blog 