Ravindar, are you using the Web Configurations view or the Internet Sites view? If you use the Web Configurations view, you should create a Mapping/Redirection document indeed. In the IP address fill in the IP address of server xxx (fully qualified hostname should work as well). In the incoming URL path specify “/aaa/ccc.nsf”. In the Redirection URL string specify the entire new URL string: “http://yyy/comm/aaa/ccc.nsf”. That should work.