I have two Wyse zero clients connected to HP server running Multipoint 2012.
As part of the system the zero clients will need to use IP audio to talk to remote stations (Axis P8221 IP audio devices).
Can only hear, cannot talk. Even tried a USB audio device at server - no change. Can hear mic locally. It's just that the streaming out of the server doesn't work.
Axis not a lot of help - never tried their product with Mulipoint (the IP video works fine). But their products/Active X control are Win 8 compatable.
My XP computers communicate fine with same Axis device.
Turned off firewall, tried different audio protocols.