Can we upgrade a DC server from Server 2003 to server 2012 server ?

Posted on 2014-08-21
Last Modified: 2014-08-21
We have a 32 bit server 2003 DC server. Can we upgrade it to server 2012 ? If yes then what are the advantages and disadvantages
Question by:Svlss
    LVL 95

    Accepted Solution

    Can you - Not directly and possibly not even indirectly.  Should you?  Absolutely not.  The recommendation is always to MIGRATE to a new server 2012 install, not directly upgrade!

    If your existing Server 2003 DC is a 32 bit DC, then there is NO WAY to upgrade without performing a Migration as 2012 is a 64 bit only system and there has NEVER been an upgrade from 32 bit to 64 bit - that's always been migration.
    LVL 26

    Assisted Solution

    You can not directly upgrade 32 bit OS to 64 bit OS.
    And I would never recommend to upgrade a domain controller.
    LVL 5

    Assisted Solution

    LVL 34

    Assisted Solution

    make 2012 server member of active directory
    Then install ADDS tools on 2012 server
    Then logon to 2012 server with account that is member of domain admins, enterprise admins and schema admins
    Then insert 2012 DVD and navigate to adprep.exe path on DVD from elevated command prompt
    Then run below commands
    adprep /forestprep
    adprep /domainprep
    adprep domainprep /gpprep
    if you want to put RODC, then run, adprep /rodcprep

    once these operations completed successfully, start server manager and install active directory server role

    In reality you can directly run AD server role without running above commands
    However, I prefer to run commands 1st to identify errors if any
    I seen some times issues are reported after direct DC promotion
    LVL 7

    Expert Comment


    Author Closing Comment

    Thank you guys

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