When you run adprep /forestprep, you are updating the Active Directory schema forest version. Several people have asked, what is the forest schema version for Windows Server 2008 R2. To learn more about adprep and forestprep and schema versions, read Running Adprep.exe (http://technet.microsoft.com/en-us/library/dd464018.aspx).

  • If you run adprep /forestprep for Windows Server 2008 R2, confirm that the objectVersion attribute value is set to 47
  • If you run adprep /forestprep for Windows Server 2008, confirm that the objectVersion attribute value is set to 44

Forest schema version 47: Windows Server 2008 R2 Adprep /forestprep

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