To use remote Lync on Windows from  xfreerdp:

Enable Remote Recording in Windows:
run regedit and set:
"HKLM\SYSTEM\CurrentControlSet\Control\Terminal Server\WinStations\RDP-Tcp\fDisableAudioCapture REG_DWORD" ==  0 (zero)

from: https://support.microsoft.com/en-us/kb/2020918



then (with alsa sound):
xfreerdp -u $username -p $password --plugin rdpsnd --data alsa --  --plugin drdynvc --data tsmf audin --  $target

from: https://github.com/FreeRDP/FreeRDP/wiki/Plugins