Just to make sure your Lync integration shows in the A image here are the steps you need to do.

 

Realize that the "Instant messenger sign-in" Option in the advanced contact settings signs the user in whenever the record is called. So if you have the Lync Server C not running you get 2 infolog messages each time you open such a Lync enabled record. My best practice is to have server C always running. However if you are short on system resource you'd better Check that option only when you want to demo Lync integration.

Enjoy