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Unable to joint Server 2008r2 to a DC Server 2008 Enterprise RRS feed

  • Question

  • I have tried using the command on the Windows Server 2008 Enterprise ADPREP /FORESTPREP as indicated on the Windows Server 2008 r2 when I was setting up the DCPROMO command. It does not let me continue the setup. I went to the Server 2008 and try to run the command ADPREP /FORESTPREP and told me that the command was already executed and that it did not made any changes. So I do not know what else to do... Could any body help me? Thanks!
    Miguel A. Moreno Alfa Logos inc. Tel. 514-253-2548
    Tuesday, March 1, 2011 10:21 PM

Answers

All replies

  • It may be as simple as the fact that you ran the incorrect version of ADPREP?  the ADPREP for 2008 is not the same as the ADPREP for 2008 R2.  First step is validate your schema version.

    How to Validate Your Current Active Directory Schema Version
    http://www.anitkb.com/2010/04/how-to-validate-your-current-active.html

    Next, make sure you not only prep'd the forest, but also each domain in the forest.

    Preparing your Active Directory Infrastructure for 2008
    http://www.anitkb.com/2010/03/preparing-your-active-directory.html


    Visit: anITKB.com, an IT Knowledge Base.
    • Marked as answer by Bruce-Liu Tuesday, March 29, 2011 9:09 AM
    Wednesday, March 2, 2011 12:06 AM
  • Thank you for your reply. I use the original cd-rom installation for 2008 std to run the command from the sources subdirectory, but it tells me that the ADPREP has already run and no change has been made to the system. In the Windows 2008 R2 I runned the DCPROMO but right after authenticating the user with the credentials of the Server 2008, it stops right there telling me that I have to run ADPREP /FORESTPREP from the 2008R2 dvd. Now, the windows 2008 Std is a 32bit and the 2008 R2 is 64 bit, does this matter? Thank You! :-) for your help!


    Miguel A. Moreno Alfa Logos inc. Tel. 514-253-2548
    Wednesday, March 2, 2011 12:25 AM
  • Ok, so it appears that you do need to update your schema for 2008 R2.  As I mentioned, the ADPREP on the 2008 DVD is for 2008, not 2008 R2.  If you current DC is running 32 bit, then you will run ADPREP32.EXE from the 2008 R2 DVD media.  The instructions are provided in the link I posted above.

     


    Visit: anITKB.com, an IT Knowledge Base.
    Wednesday, March 2, 2011 12:55 AM
  • Thanks for your reply. I tried following all the instructions above, (I printed the papers) and I tried doing the command in both servers. 2008Std it said that the command had already run and it will not try to rerun. On the 2008R2, it said that the command has to be runned on the Master Forest, so I understood the 2008Std. So I did not get anywhere. I am very confused! In any case. Thank you so much for your help. I really do not understand why I am not able to finish the dcpromo on the new 2008r2. Nervertheless, I am able to see all the users from the 2008Std in the R2. Thanks for your insight! miguel


    Miguel A. Moreno Alfa Logos inc. Tel. 514-253-2548
    Wednesday, March 2, 2011 2:01 AM
  • Hello,

    make sure to use the Windows server 2008 R2 installation disk on the existing FSMO roles holder.

    Additional use adpre32.exe for 32bit OS version from Windows server 2008 and adprep.exe for 64bit OS versions.

    More details you see in: http://msmvps.com/blogs/mweber/archive/2010/02/10/upgrading-an-active-directory-domain-from-windows-server-2003-to-windows-server-2008-or-windows-server-2008-r2.aspx

    Just replace the OS versions in the article accordingly, steps are the same.


    Best regards Meinolf Weber Disclaimer: This posting is provided "AS IS" with no warranties or guarantees , and confers no rights.
    • Marked as answer by Bruce-Liu Tuesday, March 29, 2011 9:09 AM
    Wednesday, March 2, 2011 5:55 AM
  • Take a look at the below article & it will show you all the steps.

    http://blogs.technet.com/b/askds/archive/2008/11/11/so-you-want-to-upgrade-to-windows-2008-domain-controllers-adprep.aspx

    http://blogs.dirteam.com/blogs/sanderberkouwer/archive/2008/03/02/transitioning-your-active-directory-to-windows-server-2008.aspx

    ADPREP.exe is for 64bit OS, since you got windows 2003 32bit use ADPREP32.exe which is located inside windows 2008 R2 has to be used.

    http://blogs.dirteam.com/blogs/sanderberkouwer/archive/2008/04/08/upgrading-your-active-directory-to-windows-server-2008.aspx

    If you use 2008 R2 CD you can add 2008 R2 as an domain controller & if you use 2008 CD you can't introduce 2008 R2 as an domain controller.

    The schema version differs from windows 2008 R2 to windows 2008.

    47 - 2008 R2

    44 = 2008

    31 = W2k3 R2

    30 = W2K3

     

    Troubleshooting ADPREP Errors

    http://blogs.technet.com/b/askds/archive/2008/12/15/troubleshooting-adprep-errors.aspx

    http://technet.microsoft.com/en-us/library/bb727058.aspx

     

    Regards


    Awinish Vishwakarma| MY Blog

    Disclaimer: This posting is provided AS-IS with no warranties or guarantees and confers no rights.

    • Marked as answer by Bruce-Liu Tuesday, March 29, 2011 9:09 AM
    Wednesday, March 2, 2011 6:01 AM
  • Hi,

     

    You need to insert the Windows Server 2008 R2 installation disc into the Windows Server 2008 (not R2) computer. Then, use the 32-bit version of Adprep.exe (Adprep32.exe) from the R2 disc.

     

    After that, the AD schema version should be upgraded to 47. To check the schema version, please refer to: How to find the current Schema Version


    This posting is provided "AS IS" with no warranties, and confers no rights. Please remember to click "Mark as Answer" on the post that helps you, and to click "Unmark as Answer" if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.
    • Marked as answer by Bruce-Liu Tuesday, March 29, 2011 9:09 AM
    Wednesday, March 2, 2011 10:24 AM
  • Thank you, great answers. Problem solved!

    Miguel A. Moreno Alfa Logos inc. Tel. 514-253-2548

    Saturday, March 12, 2016 3:15 AM