The Address Book is a collection of address books provided by Microsoft Outlook, Microsoft Exchange Server, or Internet directory services, depending on how you have set up Outlook. You can use the Address Book to look up and select names, e-mail addresses, and distribution lists when you address messages. When you type a name in the To, Cc, or Bcc box of an e-mail message, Outlook automatically checks to see if the name you typed matches a name in the Address Book. If there is a match, the name is resolved and you can send the message. If there is.
