Outlook: Change Default Address Book

Steps:

• Step 1: From Outlook contacts click Address Book from the ribbon.

• Step 2: The Address Book dialog box will open, click Tools > Options. 

• Step 3: Under "When opening the Address book, show this address list first." > select the drop-down arrow to select the name of the address book you would like to use by default. (Anoka Ramsey chosen below for example)

• Step 4: Click OK and close the dialog box. 

• Step 5: Restart Outlook application, the selected default Global Address List should now be reflected.