Windows Server: How do I import an ADMX/ADML file in Windows 2012 and Active Directory

To import an ADMX file
1. Copy the ADMX files to the folder C:WindowsPolicyDefinitions folder on the machine performing the group policy object editing
2. Copy the ADML files to the folder C:WindowsPolicyDefinitions<language> folder on the machine performing the group policy object editing

If you’re using a central store for Active directory:

1. copy the ADMX  files to the folder SYSVOL<domain>policiesPolicyDefinitions
2. copy the ADML files to the folder SYSVOL<domain>policiesPolicyDefinitions<language>

(Replace <language> with the correct language, such as EN-US)

By J Savill and Nighthawk