Hi, I have setup a Front-End server with Exchange server 2003 and OWA works fun. Now i want to block OWA on the Back-End server (Exchange 2003). That means I just want our users log onto OWA with Front-End server IP address ( Http://front-end ip/exchange)and do not want users log onto the OWA with the Back-End server IP address (Http://Back-end ip/exchange). Could you tell me how to do it? Thanks.