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Office 2016 Administration Templates and Conversion Tool
In case you missed it the Office 2016 ADMX templates are no longer part of the Office Resource Kit like previous version. You can download the ADMX files here https://www.microsoft.com/en-us/download/details.aspx?id=49030 Also, if you have a bunch of Office 2013 GPO setting you want to copy across to Office 2016 policy you can also there is a PowerShell script on GitHub...