Microsoft have released the ADMX templates for the Windows 10 1703 Creators Update. Updating your ADMX templates will allow you to configure GPO objects specific to the Windows 10 1703 Creators Update. In addition if you are using Server 2012 for example and have never installed any previous ADMX Templates For Windows 10, installing this ADMX Template update will give you the ability to configure Windows 10 Group Policy settings.
Next install the updated Administrative Templates for Windows 10 1703 Creators Update, i simply installed these to the default location.
Next navigate to C:\Program Files (x86)\Microsoft Group Policy\Windows 10 Creators Update\PolicyDefinitions or the location you installed the templates to:
Now open C:\Windows\SYSVOL\sysvol\your-domain.local\Policies\PolicyDefinitions
If the PolicyDefinitions folder does not exist, simply create this. If you have never installed ADMX Templates before this folder will likely not exist.
Now copy all the .admx files in the root of C:\Program Files (x86)\Microsoft Group Policy\Windows 10 Creators Update\PolicyDefinitions along with the folder for your language (for myself this was en-US) to C:\Windows\SYSVOL\sysvol\your-domain.local\Policies\PolicyDefinitions
The end result should be you have the language folder and the .admx files in C:\Windows\SYSVOL\sysvol\your-domain.local\Policies\PolicyDefinitions as shown below:
When you edit your group policy you will now see you can configure Windows 10 only features, for example: