Windows 2008R2 Domain Controller


Our environment is such: 2 Windows Server 2008 Non R2 domain controllers.  Domain Functional Level is at 2003 because we have an Exchange 2003 mail server (We are in process of upgrading it).

I need to add a Windows Server 2008 R2 Domain Controller.  Can this be added without affecting the other 2 2008 non R2 DC's or having to raise the domain functional level?  Or will I have to run dcprep on the NON R2 DC's?   Please advise.
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

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.

Chris HInfrastructure ManagerCommented:

It will run in 2003 functional level no problem.

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
Mr TorturSystem EngineerCommented:
+1, it will work without affecting existing 2008R1 DCs and domain level.
It seems (a little surprising to me..) that you even can have a RODC, which is a windows 2008 option :
Scott CSenior EngineerCommented:
Even a Server 2012 R2 will work in a functional level of 2003.

You are aware that with Exchange 2003 you cannot upgrade directly to Exchange 2013 right?  

If you are going to Exchange 2013, your best option is to go to Exchange 2010, remove the Exchange 2003 machine(s) then upgrade to Exchange 2013.
ozzalotAuthor Commented:
Thank you all for your feedback.  

ScottCha,  Thanks for the great tip on Exchange upgrade path.  I'll keep that in mind when when decide to upgrade exchange after this.
Scott CSenior EngineerCommented:
Sure thing.   Didn't want you trying to install Exchange 2013 and being surprised when the install stops.

If Exchange 2013 detects Exchange 2003 or earlier in an environment, the install will not continue.
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.