Prerequisites: You are the domain administrator and have installed Evercontact from the Google Apps market place.
From your Evercontact Corporate settings click “Activate your domain users now”.
If you don’t see the above link, click on the ‘centralization’ tab and then click on the ‘Configure my Domain Centralization’ button.
A wizard will then open and all you have to do is to select the users you want to activate and chose the centralizing address book.
Once you see this screen you will receive an email confirming your centralization configuration.
For more information, check out our Evercontact for Google Apps documentation.