User Configuration > Administrative Templates > Microsoft Word 2016 > Word Options > Display
User
HKCU\software\policies\microsoft\office\16.0\word\options
This policy setting controls whether text that is formatted as hidden displays on Word users' monitor screens. If you enable this policy setting, Word displays hidden text at all times. Hidden text on monitor screens displays as underlined with a dotted line. If you disable or do not configure this policy setting, Word does not display text formatted as hidden unless "Show/Hide ΒΆ" is selected or Word is configured to show hidden text in the "Display" section of the "Word Options" dialog.