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Unable to open Adctive Directory Users and Computers

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  • Unable to open Adctive Directory Users and Computers

    Hi,

    suddenly we are facing issue with our PDC, some time when we try to Open "Active Directory Users And Computers" following Error occurring !

    mmc cannot open the file c /windows/system32/dsa.msc, for details added attachment.

    1. Tried to Execute dsa.msc from Run and from Run>MMC but problem remains.
    2. Tried to Log On through different User but still same.

    How to resolve this permanently ?
    Attached Files

  • #2
    Re: Unable to open Adctive Directory Users and Computers

    mmc cannot open the file c /windows/system32/dsa.msc

    Have you had a look through the list in the above link to see if one of the solutions works for you?
    1 1 was a racehorse.
    2 2 was 1 2.
    1 1 1 1 race 1 day,
    2 2 1 1 2

    Comment


    • #3
      Re: Unable to open Adctive Directory Users and Computers

      Do you have any other DCs? It is time to migrate away from 2003 if at all possible.
      http://www.microsoft.com/en-us/serve...s-server-2003/
      Regards,
      Jeremy

      Network Consultant/Engineer
      Baltimore - Washington area and beyond
      www.gma-cpa.com

      Comment


      • #4
        Re: Unable to open Adctive Directory Users and Computers

        Migration is Done on same Hardware ? we have here 64bit Compitible CPU in Server, but we are running Windows 2003 Server R2 32Bit. Some clients are still having Windows XP

        We have Licence for Windows 2008R2, can we do upgrade from Windows 2003 Ad ro Windows 2008R2 without losing connection of Windows Xp Stystems ?

        Comment


        • #5
          Re: Unable to open Adctive Directory Users and Computers

          You can upgrade as long as the architecture (32 or 64 bit) remains the same, although a fresh install ("Swing migration") would probably be better

          Yes, XP will connect to 2008R2 DCs
          Tom Jones
          MCT, MCSE (2000:Security & 2003), MCSA:Security & Messaging, MCDBA, MCDST, MCITP(EA, EMA, SA, EDA, ES, CS), MCTS, MCP, Sec+
          PhD, MSc, FIAP, MIITT
          IT Trainer / Consultant
          Ossian Ltd
          Scotland

          ** Remember to give credit where credit is due and leave reputation points where appropriate **

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          • #6
            Re: Unable to open Adctive Directory Users and Computers

            Originally posted by sunnys_111
            we are running Windows 2003 Server R2 32Bit
            Originally posted by sunnys_111
            can we do upgrade from Windows 2003 Ad ro Windows 2008R2
            No. You cannot upgrade a 32bit 64bit operating system to a 64bit operating system.

            Now you could create a temporary Virtual DC on different hardware and once AD Replication has occurred then you could Demote and wipe the Windows 2003 32bit operating system and install Server 2008R2 on the hardware. Once you DCPromo and replication of AD has finished the temporary Virtual DC can be Demoted and removed.
            1 1 was a racehorse.
            2 2 was 1 2.
            1 1 1 1 race 1 day,
            2 2 1 1 2

            Comment

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