How to update the Policy Definitions template

Administrative templates are divided into admx and language files(adml files).

Windows uses central store to store the files, the central store is located on the sysvol share which is located here:
\\contoso.com\SYSVOL\contoso.com\policies\PolicyDefinitions

To update the definitions you will have to download and install the latest version, which you can find here:
https://www.microsoft.com/en-us/download/details.aspx?id=106254

Once you have install it copy all files from the it will be located in either of the 2 places:

•  C:\Windows\PolicyDefinitions
• C:\Program Files (x86)\Microsoft Group Policy\<version-specific>\PolicyDefinitions

And place them into sysvol folder

• \\contoso.com\SYSVOL\contoso.com\policies\PolicyDefinitions