Cannot Set Profile Picture – Users of Lync 2013
are unable to change profile pictures. This is a limitation between
the client and the infrastructure. The option is disabled.
People Can Share Video But Not Audio - Confirm the
microphone is connected and working properly in another
application. If it is, have them select Options and, under
Audio Device, click Check Call Quality. Audio should
then work correctly.
Follow Microsoft's descriptions of other known Lync