Adding backup domain controller to Windows 2008 domain

Our current domain controller runs Windows Server 2008. Tried to add a second domain controller that runs Windows Server 2008 R2 to the domain and I get a message saying that I have to run adprep first, using the command "adprep /forestprep" (please see attached image). Is this expected? Current DC is not R2.
bobox00Asked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Cliff GaliherCommented:
Yes, that is expected, and yes you must upgrade the forest and domain schema before you can make a 2008 R2 server a domain controller.
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Seth SimmonsSr. Systems AdministratorCommented:
you also need to run adprep /domainprep after /forestprep

run adprep32 if your 2008 server is 32bit

http://technet.microsoft.com/en-us/library/dd464018%28v=ws.10%29.aspx
0
Brian PiercePhotographerCommented:
Yes - its a simple process

Put the 2008R2 disk in the existing DC (if it autoruns then abort).

Then run from the sources folder on the DVD run
adprep /forestprep
this may take a few minutes, then run
adprep /domainprep
this will only take a few seconds
0
bobox00Author Commented:
Thanks for your comments. I plan to now upgrade the server first, to Windows 2012. Will it be the same process?
0
Brian PiercePhotographerCommented:
You will not need to run adprep again - 2012 automatically does adprep in the background.
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Windows Server 2008

From novice to tech pro — start learning today.