Change Default Address Email Contact List
You can customize which Address List is loaded when you first start Outlook.
Any APC user who would like to customize which address list loads at startup.
A valid Microsoft Office license that includes Outlook.
How to change default address/email contact list from default Global List
In Outlook 2010, Outlook 2013 and Outlook 2016 > Click on Address Book icon on the right side of the Home tab in the Ribbon.
In the Address Book dialog box, click on Tools > Options
Use the dropdown list for “When opening the address book, show this address list first” to set your preferred address list.
Click Ok. Close the Address Book dialog.