Whether you’re in Mail, Calendar, People, or Tasks view, the Address Book is where you can access all of your contact sources. Most people work with the Global Address List that is tied to their organization’s email server and the Outlook Address Book that is tied to their personal account.
The Address Book window displays one group of contacts at a time. To view another, click the Address Book list arrow in the upper-right corner and select a different contact source.
A small contact card appears, with links to communicate with the contact. From here, you can start composing a new email to this contact, or click the View More Options button to access a list of additional actions.