Adprep success, DCPROMO fails

Question

I have asked this on other forums and wasn't able to find a solution so I am posting it here since everyone here has such a large wealth of knowledge. I currently have a 3 Windows 2000 Servers (SP4 on all current DC's) and I just purchased a new server which I installed 2003 x64 R2 on. I am in the process of running DCpromo and get the adprep error that you get when your current domain hasn't been prepped with the adprep tool. After fixing a role problem that was preventing adprep from running I ran both 'adprep /forrestprep - adprep /domainprep' on the global catalog server and both reported success. After I let replication occur I tried to make the new server a DC and still get the same message 'the version of the Active Directory schema of the source forest is not compatible with the version of active directory on this computer.' Here are the logs from adprep that I ran a second time on the Global Catalog: Forest-wide information has already been updated. [Status/Consequence] Adprep did not atempt to rerun the operation Domainwide information has already been updated. [Status/Consequence] Adprep did not attempt to rerun the operation After checking my dcdiag I found that everything passed including my FsmoCheck. I don't know what else to check; is their a way to manually check each server and ensure that they are all prepped? PS, One poster told me to install 2003 x64 without the R2 edition, but I don't have the older version only the new ones I purchased from Dell.

Mark_A_Smith · Answer

W2K3 'R2' requires that you run the adprep from the R2 media.  The R2 version will extend the schema AGAIN.   NOTE:  The x64 adprep will NOT run on a 32bit OS server... Message Edited by Mark_A_Smith on 11-22-200608:15 AM

Mark_A_Smith · Answer

Here is from a Microsoft doc that I found that covers this:

To apply Windows Server 2003 R2 schema extensions to the Active Directory schema

1. Insert the second Windows Server 2003 R2 installation disc in the CD drive of the domain controller that holds the schema master operations role (also known as flexible single master operations (FSMO)).

2. Log on to the computer as a member of the Schema Admins group.

3. Click Start, point to All Programs, point to Accessories, and then click Command Prompt.

4. At the command prompt, type the following commands, substituting the drive letter of the CD drive for drive:

drive:

cd \cmpnents\R2\adprep

adprep /forestprep

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