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Hi EE, 
 
I've already performed the below prep from the W2K with SP4 which is the existing DC. 
 
adprep /forestprep 
adprep /domainprep 
adprep /domainprep /gpprep 
 
I'm planning to migrate W2K domain controller into Windows 2008 Server x64 R2, then transfer the FSMO roles: But, when I ran the &nbsp;'DCPROMO&quot; from Windows 2008 Server x64 R2, a member server, &nbsp;and add it as additional DC, it says that I need to run the &quot;adprep /forestprep&quot; in the domain controller. WHY??? I've already done the preps! 
 
 
 
Virtual Network Environment: 
 
DC = Windows 2000 server with SP4 with 32 bit O/S 
Ran successfully &nbsp;= adprep /forestprep; adprep /domainprep ; adprep /domainprep /gpprep using the Microsoft Windows Server 2008 Standard x64 Edition DVD 
 
Memberserver = Windows 2008 server R2 with 64 bit O/S (Evaluation version) 
Tried running DCPROMO to promote this member server as &quot;additional domain controller&quot; 
BUT an error comes up &quot;&nbsp;that adprep/forestprep must be run on the domain controller. 
 
Any idea what's missing or needed to be done so the member server can be added as additional DC, before I transfer the FSMO roles ? 
 
Thanks heaps in advance 

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Hi EE,

I've already performed the below prep from the W2K with SP4 which is the existing DC. 

adprep /forestprep
adprep /domainprep
adprep /domainprep /gpprep

I'm planning to migrate W2K domain controller into Windows 2008 Server x64 R2, then transfer the FSMO roles: But, when I ran the  'DCPROMO" from Windows 2008 Server x64 R2, a member server,  and add it as additional DC, it says that I need to run the "adprep /forestprep" in the domain controller. WHY??? I've already done the preps!



Virtual Network Environment:

DC = Windows 2000 server with SP4 with 32 bit O/S
Ran successfully  = adprep /forestprep; adprep /domainprep ; adprep /domainprep /gpprep using the Microsoft Windows Server 2008 Standard x64 Edition DVD

Memberserver = Windows 2008 server R2 with 64 bit O/S (Evaluation version)
Tried running DCPROMO to promote this member server as "additional domain controller" 
BUT an error comes up " that adprep/forestprep must be run on the domain controller.

Any idea what's missing or needed to be done so the member server can be added as additional DC, before I transfer the FSMO roles ?

Thanks heaps in advance


adprep/forestprep must be run on the domain controller

Active Directory (AD) is a Microsoft brand for identity-related capabilities. In the on-premises world, Windows Server AD provides a set of identity capabilities and services, and is hugely popular (88% of Fortune 1000 and 95% of enterprises use AD). This topic includes all things Active Directory including DNS, Group Policy, DFS, troubleshooting, ADFS, and all other topics under the Microsoft AD and identity umbrella.

Active Directory

Windows Server 2008 and Windows Server 2008 R2, based on the Microsoft Vista codebase, is the last 32-bit server operating system released by Microsoft. It has a number of versions, including including Foundation, Standard, Enterprise, Datacenter, Web, HPC Server, Itanium and Storage; new features included server core installation and Hyper-V.

Windows Server 2008

Windows 2000 is an operating system for use on both client and server computers. It is the successor to Windows NT 4.0, and is the last version of Microsoft Windows to display the "Windows NT" designation. Four editions of Windows 2000 were released (Professional, Server, Advanced Server, and Datacenter Server) that shared a core set of features, including many system utilities such as the Microsoft Management Console. All versions of the operating system support NTFS 3.0, Encrypting File System, as well as basic and dynamic disk storage. The Windows 2000 Server family includes support for Active Directory services, Distributed File System and fault-redundant storage volumes.