You can add this service in the following way. Outlook can only show contacts from your Contacts folder(s) in the Address Book when the Outlook Address Book Service has been added to your mail profile. Make sure the Outlook Address Book service is added to the Mail Profile
This guides lists the two things you’ll need to check and set correctly, and offers a solution in case that fails. When trying to use the Address Book to address a message to a contact, you could find that the contacts from your Contacts folder aren’t listed.
