To get the new features in Windows 8 and Windows Server 2012 for a Windows 2008 domain you have to do the following steps:
- Donwload the complete set of Administrative Template files for Windows 8 and Windows Server 2012.
- Install the downloaded MSI on a computer
- On the computer copy the folder "PolicyDefinitions" located in "C:\Program Files (x86)\Microsoft Group Policy\Windows Server 2012\" to "\\YourDomain\SYSVOL\YourDomain\Policies"
- If you have more than one DC the folder will be replicated depending on your schedule interval in Site and Services