Prerequisites Download Windows Server 2012 R2 . You also have the ability to complete this Step-By-Step in a virtual lab by downloading Hyper-V Server 2012 for free . As a precaution, complete a full backup of your existing server. Check the Schema version of AD DS (Before adprep) by running regedit, navigating to Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\NTDS\Parameters and noting the current Schema version. Step 1: Preparing your existing forest via the adprep command Insert the Windows Server 2012 DVD into the DVD drive of the Windows Server 2008 R2 AD DS. Open command prompt, and type adprep /forestprep and press enter . Check the Schema version of AD DS (After adprep) by running regedit, navigating to Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\NTDS\Parameters and noting the current Schema version. Step 2: Promoting the Windows Server 2012 Server domain controller Complet...
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