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Further, there is no such thing as a PDC in active directory.
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Further, there is no such thing as a PDC in active directory.

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We are looking to upgrade our AD to 2008, I have found a couple of guides which I intend to follow, the schema update before this can be done, does this need to be done on all domain controllers or can it be done on the primary domain controller and then it will replicate to the others?<br />
<br />
So I would do:<br />
adprep.exe /forestprep <br />
adprep.exe /domainprep <br />
adprep.exe /domainprep /gpprep<br />
<br />
Is it worth at this point doing any exchange 2010 preps? as we will be looking to move to this also.<br />
<br />
Cheers.
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We are looking to upgrade our AD to 2008, I have found a couple of guides which I intend to follow, the schema update before this can be done, does this need to be done on all domain controllers or can it be done on the primary domain controller and then it will replicate to the others?

So I would do:
adprep.exe /forestprep 
adprep.exe /domainprep 
adprep.exe /domainprep /gpprep

Is it worth at this point doing any exchange 2010 preps? as we will be looking to move to this also.

Cheers.

Schema Update for Win2003 to Win2008

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 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).

Windows Server 2003

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.