Hi Hanan install ISA in integrated mode. Then try these settings. I have used them its working You need to create the following protocols definitons (under Policy Elements): 1. Yahoo! Voice #1 TCP Port 5001 Outbound 2. Yahoo! Voice #2 TCP Port 5000 Outbound 3. Yahoo! Voice UDP UDP Port 5000 Receive Send 4. Yahoo! WebCam TCP Port 5100 Outbound Hope the above mentioned protocol are help you to enable voice conversation through yahoo. hanan <nouran@xxxxxxxxx> wrote: st1\:*{behavior:url(#default#ieooui) }http://www.ISAserver.org Hello Could you please tell me how I can enable my users to have a voice conversation with yahoo My users are secure Nat clients Best regards Hanan.Mawla (MCSE,MCT,CCNP) ------------------------------------------------------ List Archives: http://www.webelists.com/cgi/lyris.pl?enter=isalist ISA Server Newsletter: http://www.isaserver.org/pages/newsletter.asp ISA Server FAQ: http://www.isaserver.org/pages/larticle.asp?type=FAQ ------------------------------------------------------ Exchange Server Resource Site: http://www.msexchange.org/ Windows Security Resource Site: http://www.windowsecurity.com/ Windows 2000/NT Fax Solutions: http://www.ntfaxfaq.com ------------------------------------------------------ You are currently subscribed to this ISAserver.org Discussion List as: kashif1276@xxxxxxxxx To unsubscribe send a blank email to $subst('Email.Unsub') --------------------------------- Do you Yahoo!? Yahoo! Mail Plus - Powerful. Affordable. Sign up now