ADPREP /Forestprep Language Problem RRS feed

  • Question

  • We are running two domain controllers on our network which are 2012. These have been upgraded in the past from 2008 R2. We are in the stages of getting out domain ready for 2012 r2 Domain controllers.

    We are trying to run the adprep /forestprep command as MS websites are telling us to. It is coming back with the problem of


    “Can not open adprep.dll.mui”

    “Did you fail to copy over the adprep language folders?”


    We are running this on the main DC Server and running this as the full Administrator with command prompt running as administrator.


    I have been browsing the internet looking for a resolve and not had much luck. Disabled all non windows services, check the language settings and tried to rename language folder. We are still unable to get any future.

    Does anyone have a resolve for this problem please?

    Tuesday, April 8, 2014 3:38 PM


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