2012-Promote-to-DC.png

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Hello Experts,<br />
<br />
I have the following AD environment:<br />
<br />
Functional Level: 2003<br />
<br />
1 Windows Server 2003 = PDC, all FSMOs, Primary DNS, DHCP<br />
1 Windows Server 2008 R2 = Backup Domain Controller<br />
<br />
I am planning to add another Server 2012 R2 &nbsp;to become my next Primary Domain Controller. I will be migrating all FSMO roles from my Windows Server 2003 PDC to this new server and then decommission the Windows Server 2003 server and elevate the functional level of my domain to 2008. <br />
<br />
My question is do I have to run ADPREP again before I can raise the 2012 server to become &nbsp;a domain controller?
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Hello Experts,

I have the following AD environment:

Functional Level: 2003

1 Windows Server 2003 = PDC, all FSMOs, Primary DNS, DHCP
1 Windows Server 2008 R2 = Backup Domain Controller

I am planning to add another Server 2012 R2  to become my next Primary Domain Controller. I will be migrating all FSMO roles from my Windows Server 2003 PDC to this new server and then decommission the Windows Server 2003 server and elevate the functional level of my domain to 2008. 

My question is do I have to run ADPREP again before I can raise the 2012 server to become  a domain controller?

Migrate Active Directory from Server 2003 to Server 2012 R2

The Microsoft Server topic includes all of the legacy versions of the operating system, including the Windows NT 3.1, NT 3.5, NT 4.0 and Windows 2000 and Windows Home Server versions.

Microsoft Server OS

Windows Server 2012 is the server version of Windows 8 and the successor to Windows Server 2008 R2. Windows Server 2012 is the first version of Windows Server to have no support for Itanium-based computers since Windows NT 4.0. Windows Server 2012, now in its second release (Windows Server 2012 Release 2) includes Foundation, Essentials, Standard and Datacenter, and does not support IA-32 or IA-64 processors.

Windows Server 2012

Windows Server 2003 was based on Windows XP and was released in four editions: Web, Standard, Enterprise and Datacenter. It also had derivative versions for clusters, storage and Microsoft’s Small Business Server. Important upgrades included integrating Internet Information Services (IIS), improvements to Active Directory (AD) and Group Policy (GP), and the migration to Automated System Recovery (ASR).