The Quick Campaign form is not editable from the Wizard form (Under Customizations) and as per the Microsoft description for the Wizard form (“Appointment form for use in the quick campaign dialog and distribute campaign activity dialog.”) it seems like we can edit it and is open to edit but when we add new fields and publish, it does not reflect the changes.
Looking at the "Create Quick Campaign dialog" Dialog Box that is under a managed solution and not editable.
Requesting to make the Quick Campaign form editable so we can add custom fields to it.