You can view your Contacts list from the Contacts tab.
At the top, tap Lync to view just your Lync contacts, or tap iPhone to view all your contacts including all your Lync and phone contacts.
The Contacts list in Lync 2013 on the desktop is the same list as in the Lync app. If you have to make changes to your Contacts list, you’ll need to do it from Lync running on your desktop. You can only view your Contacts list from the Lync for iPhone app, but you can’t make changes to it from the app.