troubleshooting Question

Upgrading to Windows 2003 AD. AD Install wizard says i need to adprep, but i already have

Avatar of msidnam
msidnamFlag for United States of America asked on
Microsoft Server OSActive DirectoryWindows Server 2003
6 Comments2 Solutions265 ViewsLast Modified:
We are trying to upgrade our Win 2000 AD to Win 2003. We tested the upgrade in a virtual environment and eveything went pretty smooth. When we tried it tonight in our live environment during the Windows 2003 AD wizard setup I got this error:

The operation failed because:

The Active Directory Installation Wizard cannot continue because the forest is not prepared for installing Windows Server 2003. Use the Adprep command-line tool to prepare both the forest and the domain. For more information about using the Adprep, see Active Directory Help.

"The version of the Active Directory schema of the source forest is not compatible with the version of Active Directory on this computer."

When i run adprep /forestprep and /domainprep it says that it's already been done (which i did a while ago when i installed Exchange 2003). I also checked and i dont have the mangled LDAPDisplayName attributes. the only difference that i can think of between the virutal and live environment is that i did one last windows update to make sure i had all the critical updates installed. Not sure if that would have done anything. I dont see anything in the event viewer logs.
Join our community to see this answer!
Unlock 2 Answers and 6 Comments.
Start Free Trial
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 2 Answers and 6 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