[danielvf]

I'm not the GP, but I have a client who uses Lync. We usually have conference calls with three or four people, and someone always has an audio problem.

The screen sharing also seems to take a while to sync up. Worse, it silently stops updating somewhere in the call. Lync seems to have the worst real world performance of any screen sharing / conferencing app I've used.

[Ecio78]

have you checked firewall issues? MS has a list of ips, urls and protocols that need to be open in order to use it.