Hi,
I have sucessfully connected Asterisk 1.6 Beta 5 to Exchange 2007. So far everything is working. The only thing I don’t really like is that softphones need a connection to the Exchange for the voice stream. I know that this seems to be a normal behavior for voip, but when I have a PBX the voice-stream should go over the PBX.
The reason why I’m asking is, that we have some external workers connected to our company via vpn. If I can’t configure it that the voice-stream goes over the pbx I have to open the firewall to let the traffic to the exchange and other internal softphones and that would be really bad 
Is there an option in sip.conf where I can configure this behavior?
Greetings from Germany
Jürgen