User Configuration > Administrative Templates > Microsoft Word 2016 > Word Options > Advanced > File Locations
User
HKCU\software\policies\microsoft\office\16.0\word\options
This policy setting allows you to define the default path to Clipart pictures that is set in Word Options | Advanced | General | "File Locations..." If you enable this policy setting, you may specify the default path to Clipart pictures. If you disable or do not configure this policy setting, no path is specified.