If you open the Microsoft Office Outlook 2007
Address Book (Address Book: The collection of address books that you can use to store names, e-mail addresses, fax numbers, and distribution lists. The Address Book may contain a Global Address List, an Outlook Address Book, and a Personal Address Book.) and do not see the name or e-mail address you are looking for, you might need to choose another address book from the Address Book list. If you find yourself choosing another address book frequently, you can change the default address book that is displayed when you open the Address Book.

An example of the Address Book list.
Change the default address book
The contacts in your Outlook 2007 Contacts folder make up the contents of the Outlook Address Book. If you create other Contacts folders, each of these folders is
also listed in the Address Book list, available for you to choose from.
If your company has a Global Address List (GAL) (Global Address List: The address book that contains all user, group, and distribution list e-mail addresses in your organization. The administrator creates and maintains this address book. It may also contain public folder e-mail addresses.), you also see it in the Address Book list.
Tell me more about the address books
Follow the steps below or watch the short demo.
Show me 
Video created by Office Online staff writers
- On the Standard toolbar, click Address Book

Tip You can also open the Address Book by clicking Address Book
on the Tools menu.
- Click Tools, and then click Options.
Note If you open the Address Book from an open message, the Tools menu is not available. The Address Book must be opened by either method described in Step 1.
- In the Show this address list first box, click the name of the address book that you want.
- Click OK, and then close the Address Book.
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