User Configuration > Administrative Templates > Microsoft Word 2016 > Word Options > Advanced
User
HKCU\software\policies\microsoft\office\16.0\word\options
This policy setting allows you to set the "Copy remotely stored files onto your computer, and update the remote file when saving" option in Word Options | Advanced | Save. If you enable this policy setting, "Copy remotely stored files onto your computer, and update the remote file when saving" will be set. If you disable or do not configure this policy setting, "Copy remotely stored files onto your computer, and update the remote file when saving" will not be set.