To change an organizational contact, you need to edit the user profile of both the user you want to add to the list of contacts and the user you want to remove. To add an organization contact, go to the Pilot/Personal tab of that user's profile. Check the 'Org. Contact' check-box as seen in the screen-print below. Then click the Save button. To remove an organization contact, un-check the 'Org. Contact' and save.