On my Nintex O365 Responsive form I have a "Closing Date" field that is hidden until the radio button is changed from "Opened" to "Closed". At that point I want to force the user to add the closing date before the form can be submitted (or resubmitted). I can't make the field REQUIRED in Sharepoint, because it is hidden on the form, so I'm looking for a validation formula that basically says: (My two fields are STATUS and CLOSING_DATE)
IF "Status"=Closed THEN "Closing_Date" (cannot be null or blank??)
@mikeatnationwid see if your admins can refresh the forms app in your tenant. It should be updated with the latest build which has he new rules engine as part of it.