User Configuration > Administrative Templates > Microsoft Word 2016 > Word Options > Customize Ribbon
User
HKCU\software\policies\microsoft\office\16.0\word\options
This policy setting controls whether the Developer tab will be displayed in the Ribbon. If you enable this policy setting, the Developer tab will be displayed in the Ribbon. If you disable this policy setting, the Developer tab will not be displayed in the Ribbon. If you do not configure this policy setting, the Developer tab will not be displayed in the Ribbon, but its visibility can be changed via a setting in the application Options dialog box.