When you open the Address Book, Outlook displays several different contact sources in the Show Names From The drop-down list. For example, the list includes the Global Address List and other Exchange Server address lists, the default Contacts folder, the Personal Address Book, LDAP directory service accounts, and other contacts folders the user has created.
One of the items in the list is the Outlook Address Book (OAB). The OAB consolidates all of the user's contacts folders, listing each of the contact folders. By default, the OAB only contains the default Contacts folder created when you installed Outlook. As the user adds other contacts folders, these folders also appear under the OAB.
In some cases, a user might not want a particular contacts folder to appear under the OAB. For example, he or she might use a second folder to keep track of personal contacts but not use it to address e-mail.
To streamline the OAB, you can remove a folder from the OAB list. Follow these steps:
The Outlook Address Book tab also includes a name field that specifies the name by which the folder appears in the OAB. You can change the name in this field to change how the OAB lists the folder without changing the name of the folder itself. Renaming folders in this way can help users more quickly identify address lists without requiring them to rename folders.