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??)
Thanks!
