Hi All, I want to implore Tom Shinder and Jim Harrison or any other person to write a comprehensive article urgently on "How to successfully place a VOICE CONVERSATION on MSN MESSENGER SERVICE between an external client and a client (FIREWALL OR WEB PROXY CLIENT)behind the ISA Server. For over 6 months now, I've been trying to see this through despite all the ports and rules suggested by Microsoft in the knowledge base, only File transfer and chatting are always true, but NOT voice conversation behind the ISA firewall. Pls assist. Wale __________________________________________________ Do You Yahoo!? Send FREE video emails in Yahoo! Mail! http://promo.yahoo.com/videomail/