Error message when you run the Active Directory Installation Wizard: "The version of the Active Directory schema of the source forest is not compatible with the version of Active Directory on this computer".
The version of the Active Directory schema of the source forest is not compatible with the version of Active Directory on this computer.
You can verify the operating system support level of the schema by looking at the value of the Schema Version registry subkey on a domain controller. You can find this subkey in the following location:
System Schema Version ObjectVersion values and corresponding operating system support level
|•||13=Microsoft Windows 2000|
|•||30=Original release version of Microsoft Windows Server 2003 and Microsoft Windows Server 2003 Service Pack 1 (SP1)|
|•||31=Microsoft Windows Server 2003 R2|
Windows Server 2003 R2 installation disks
Windows Server 2003 R2 comes on two installation disks. Installation disk 1 contains a slip-streamed version of Windows Server 2003 with Service Pack 1 (SP1). Installation disk 2 contains the Windows Server 2003 R2 files. If the computer has Windows Server 2003 SP1 installed, you may only have to run installation disk 2 to upgrade to Windows Server 2003 R2.
Installation disk 2 is specific to the edition of Windows Server 2003. For example, you must use a Windows Server 2003 R2, Standard Edition installation disk to upgrade a Windows Server 2003, Standard Edition-based computer. Installation disk 2 contains installation files for the x86-based version and the x64-based version of Windows Server 2003 R2.
The Adsiedit.exe utility and the Ldp.exe utility are included with Windows Server 2003 R2 support tools. To install support tools, run Suptools.msi from the \Support\Tools folder on installation disk 1.