Open Directly in Office Client Application

Supported on: At least Windows Server 2008 R2 or Windows 7

Registry

HKCU software\policies\microsoft\office\16.0\common\internet

Value name: opendirectlyinapp

Enabled: opendirectlyinapp = 1

Disabled: opendirectlyinapp = 0

This policy allows the admin to choose whether Office documents located on web servers open up directly in the App or go via the web browser