If you have Hosted PBX – voice phone services and the Lync Click-to-Call option selected, but are unable to use Lync to make a call via the phone, you will need to be sure that the proper phone is chosen for the Click-to-Call option.

1. Log into the Exchange hosted control panel.
2. Choose Hosted PBX.
3. Choose Manager Users
4. Select the user that cannot Click-to-Call
5. Under Phones: Click on the Click-to-Call link.
   

6. Click on VoIP Phone Order and Save Changes.
   

7. Try to Click-to-Call via Lync again.  If there is still no success, Log out and then back into Lync and try again.