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Currently we have all 2003 servers with 4 domain controllers. &nbsp;I am starting to upgrade the servers to 2008. &nbsp;I have read how to do an &quot;In-Place Upgrade&quot; of my primary domain controller 1st question: - is this a standard accepted practice? - The instructions show how to prepare a domain controller for the upgrade by inserting the 2008 server disk and running adprep/ forestprep &nbsp;and adprep/ domainprep - does this push to all 4 of my 2003 domain controllers? then it shows upgrading the 2003 domain controller to 2008 from the 2008 DVD. &nbsp;what about the other 3 2003 servers, do i have to upgrade them to 2008 or can i leave them at 2003? (two are in different states) &nbsp;or should I demote them?<br />
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Thank you in advance.
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Currently we have all 2003 servers with 4 domain controllers.  I am starting to upgrade the servers to 2008.  I have read how to do an "In-Place Upgrade" of my primary domain controller 1st question: - is this a standard accepted practice? - The instructions show how to prepare a domain controller for the upgrade by inserting the 2008 server disk and running adprep/ forestprep  and adprep/ domainprep - does this push to all 4 of my 2003 domain controllers? then it shows upgrading the 2003 domain controller to 2008 from the 2008 DVD.  what about the other 3 2003 servers, do i have to upgrade them to 2008 or can i leave them at 2003? (two are in different states)  or should I demote them?

Thank you in advance.

Migrating to Server 2008

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

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.