Default Address Book: Choose from multiple options including your own Contact List or a list of addresses to which you have Replied ("RepliedAddresses"). Selecting the Contacts option from the drop-down list is highly recommended.
Default Contacts Mailbox: Select the folder from the drop-down options into which you would like your contact information saved.
Directory Address Books: You may add any directory that is available through the campus. The My Domain directory address book gives you access to all campus email addresses.