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After Upgrade to 2012 R2 cannot Start the Active Directory Users and Computers

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  • After Upgrade to 2012 R2 cannot Start the Active Directory Users and Computers

    Hi All
    1.I have a 2008 R2 enterprise VM.
    2.Created a new 2008 R2 from a restore and disabled network.
    3.Upgraded to 2012 R2 standard edition.
    4.Power On the VM and cannot start the Active Directory Users and Computers Tool Because the Server Is Not Operational.

    Error message is like .. Naming information cannot be located for the following reason. The server is not operational. If you are trying to connect to a domain controller running windows 2000, verify that Windows 2000 server service pack 3 or later is installed on the DC.....

    Please let me if I need to enable the network. This will conflict with the original 2008 R2 VM. The other option for me is to power off the original 2008R2 VM and power on the new 2012 R2 VM.

    Please help.
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