Josh Condie – Reposting Ajay Sarkaria’s blog. See: http://blogs.technet.com/b/askds/archive/2015/08/07/windows-10-group-policy-admx-templates-now-available-for-download.aspx
Microsoft just released the Windows 10 Group Policy (.ADMX) templates on our download center as an MSI installer package. These .ADMX templates are released as a separate download package so you can manage group policy for Windows 10 clients more easily.
This new package includes additional (.ADMX) templates which are not included in the RTM version of Windows 10.
To download the Windows 10 Group Policy (.ADMX) templates, please visit http://www.microsoft.com/en-us/download/details.aspx?id=48257
To review which settings are new in Windows 10, review the Windows 10 ADMX spreadsheet here: http://www.microsoft.com/en-us/download/details.aspx?id=25250