Hi all, I have two exchange server 5.5. I config one exchange with mail secure publishing wizard. Second exchange isn´t possible. ISA has only one external ip address. OWA running very good on two exchange servers across ISA. Is possible two pop3 exchange behind isa with one external ip address? I hope to be clear. Excuse my english, it´s not my native language. Thank you. Enrique Arnut Administrador de Sistemas