AD – Add Windows 2012 R2 domain controller to 2008 R2 domain

Problem
You need to upgrade your active directory to support 2012 and windows 10 machines

Solution

  • Insert CD/ISO, in command prompt as admin go to you installation media folder \Support\Adprep
  • Run adprep /forestprep – Must be run on the schema operations master for the forest.
  • Run adprep /domainprep – Must be run on the infrastructure operations master for the domain
  • Run adprep /domainprep /gpprep – Must be run on the infrastructure operations master for the domain.If you already run the /gpprep parameter for Windows Server 2003, you do not have to run it again for later versions of Windows Server

Verify by

  • Log on to an administrative workstation that has ADSIEdit installed. ADSIEdit is installed by default on domain controllers that run Windows Server 2008 or Windows Server 2008 R2.
  • Click Start, click Run, type ADSIEdit.msc, and then click OK.
  • Click Action, and then click Connect to.
  • Click Select a well known Naming Context, select Configuration in the list of available naming contexts, and then click OK.
  • Double-click Configuration, and then double-click CN=Configuration,DC=forest_root_domain
    where forest_root_domain is the distinguished name of your forest root domain.
  • Double-click CN=ForestUpdates.
  • Right-click CN=ActiveDirectoryUpdate, and then click Properties.
  • Confirm that the revision attribute value is correct for the version of adprep /forestprep, and then click OK.
    • For Windows Server 2012 R2, the value is 15.
    • For Windows Server 2012, the value is 11.
    • For Windows Server 2008 R2, the value is 5.
    • For Windows Server 2008, the value is 2.
  • Click ADSI Edit, click Action, and then click Connect to.
  • Click Select a Well known naming context, select Schema in the list of available naming contexts, and then click OK.
  • Double-click Schema.
  • Right-click CN=Schema,CN=Configuration,DC=forest_root_domain, and then click Properties.
    where forest_root_domain is the distinguished name of your forest root domain.
  • Confirm that the objectVersion attribute value is correct for the version of adprep /forestprep, and then click OK.
    • For Windows Server 2012 R2, the value is 69.
    • For Windows Server 2012, the value is 56.
    • For Windows Server 2008 R2, the value is 47.
    • For Windows Server 2008, the value is 44.

Tested Platform
Windows 2008R2
Windows 2012
Windows 2012 R2

References
https://technet.microsoft.com/en-us/library/dd464018%28v=ws.10%29.aspx?f=255&MSPPError=-2147217396

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