Changing your default address book in Office 2010

By default, Outlook will use your corporate Global Address Book (GAL) as the data source to check names.  When you type an email address into the “To”, you can hit CTRL+K and this will validate the letters you have typed against matching names in the GAL.  What if you want it to search your personal repository of contacts instead? You can change the default address book by clicking on the Contacts tab in the left hand Outlook pane.  At the right of the ribbon, click on the Address Book button.

Select Tools, Options. Then choose the Address Book you wish to use. If you do not see your desired address book listed, you can select the Add button to add a new list.