troubleshooting Question

Windows 2003 forest domain level

Avatar of Cybertronnh
Cybertronnh asked on
ExchangeWindows Server 2003Windows Server 2008
5 Comments3 Solutions1093 ViewsLast Modified:
I am currently working on a project which includes replacing several 2003 servers with 2008 servers and migrating an exchange 2003 server to exchange 2010.  When I started the domain consisted of 4 2003 servers, one of which is also the exchange 2003 server.  All 4 2003 servers were DCs.  I believe this network never had a 2000 server but I can't guarantee that for certain.
I have added 4 2008 r2 servers to the network.  3 have been promoted to DCs, the 4th is to become  my Exchange 2010 server.  I have since demoted 2 of the 2003 servers.  Now for my problem.
When I attempt to install Exchange 2010, during the initial prep phase it errors out with the message "Error:  the forest functional level of the current active directory forest is not Windows 2003 native or better".  I have verified that my AD is 2003 by attempting to raise the level again - at both remaing DCs - and both reply that the AD is raised as far as it can go (2003).  I have also verified in Exchange System Manager that the AD is in native mode.  I believe that I would not have been able to promote my 2008 R2 servers to DCs if this was not the case.
Where else can I look for anything that would confuse the Exchange 2010 installation routine?
Join the community to see this answer!
Join our exclusive community to see this answer & millions of others.
Unlock 3 Answers and 5 Comments.
Join the Community
Learn from the best

Network and collaborate with thousands of CTOs, CISOs, and IT Pros rooting for you and your success.

Andrew Hancock - VMware vExpert
See if this solution works for you by signing up for a 7 day free trial.
Unlock 3 Answers and 5 Comments.
Try for 7 days

”The time we save is the biggest benefit of E-E to our team. What could take multiple guys 2 hours or more each to find is accessed in around 15 minutes on Experts Exchange.

-Mike Kapnisakis, Warner Bros