We have a requrement to remove the notification that appears when adding a contact to the "required" field on an appointment, warning the user that some of the recipients are outside your organisation, This appears to be generated from an out of the box Microsoft javascript on the appointment form. The full text of the warning is "When creating an activity with external recipient in the 'required' field, a warning pops up 'some of the recipients are outside of your organisation. These recipients will also receive this appointment when you save it".
Does anyone know how to remove this notification without having to either re-create the script without that or anything else equally as complicated?