Domain 2k8 upgrade - do you need to have a 2k8 DC running

Discussion in 'Active Directory' started by Andrew Story, Apr 3, 2009.

  1. Andrew Story

    Andrew Story Guest

    Morning all,

    When you upgrade AD to 2k8 (adprep, domainprep) do you actually have to have
    a 2008 DC running, or can the DC's be a mix of 2k/2k3 until you're ready to
    install a 2k8 DC?

    We're still running AD 2k and Exchange 2k, will be moving to Exchange 2k7 so
    need to upgrade the domain.

    Exchange 2k needs a 2k/2k3 DC in it's site to work, Exchange 2k7 needs
    minimum 2k3 DC.

    I'd like to upgrade the domain to 2k3, install a 2k3 DC in preperation to
    transition to Exchange 2k7, but would like to upgrade the domain to 2k8 if
    possible so I'm ready to roll out Server 2008 shortly after.

    Any perceived problems with this?

    Andrew Story, Apr 3, 2009
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  2. Meinolf Weber [MVP-DS], Apr 3, 2009
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  3. Although you can extend the schema to 2008, why do that. Extend the schema
    to 2003 R2 and bring up your new 2003 R2 server. Once you are happy with
    things then extend the schema 2008 and bring up your 2008 dc.
    I was just at a conference where there were discussions on schema extension
    and impact on the environment and the question came up to 100's of folks
    many from extremely large companies (100,000's of seats) and not a single
    administrator said they have ever had a problem with a schema extension, but
    still I would strongly urge you to stay in sync with the schema and the o/s.
    Paul Bergson [MVP-DS], Apr 3, 2009
  4. Andrew Story

    Andrew Story Guest

    Cheers guys.

    Andrew Story, Apr 3, 2009
  5. Jorge de Almeida Pinto [MVP - DS], Apr 17, 2009
  6. after you upgrade the schema it is not required to install a w2k8 DC right

    w2k/w2k3 DCs can happily coexist with each independent of AD schema version
    (as long as there is an AD schema that supports both versions)

    if you want to introduce w2k8 make sure to have at least domain functional
    level "Windows 2000 Native"



    # Jorge de Almeida Pinto # MVP Identity & Access - Directory Services #

    Jorge de Almeida Pinto [MVP - DS], Apr 17, 2009
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