I've been trying to establish an RDP conexion with a Windows 7 machine from Linux with sound AND microphone redirection, I have tried rdesktop, remmina and freerdp with no use.
Finally, with freerdp I have finally managed to get sound and microphone redirection but from different sessions. I mean
xfreerdp -u user -d domain -p password --plugin drdynvc --data audin -- server
Allows me to send the microphone to the remote machine.
xfreerdp -u user -d domain -p password --plugin rdpsnd --data pulse -- server
Allows me to get the sound from the remote machine, but I can't manage to get both within the same session.