We use Exchange to manage our emails and calendars. As the business manager I manage the calendars for all the therapists which work for our clinic. I am sure the when I add an appointment to one of the therapists calendars they are supposed to receive an email notification telling them I have done this, however one of the therapists is not receiving these notifications. I can't find any option to turn these notifications on or off. Please can you tell me how I turn them on?