Hello, can any one help me to block Voice on Yahoo, MSN, and on other Instent messenging services, In ISA 2K i used to rename Firewall Client name so that clients who have isntalled firewall are unable to resolve the orignal server name and Firewal shows the message that it is unaccessable, and clients were directed to use IP address in there Internet explorer and in there IMs. Thanks Hope you will Help me.... Allah Hafiz