I have OWA setup with one Exchange 2003 server and published through ISA server 2004. I am adding another Exchange server and I am not sure how to setup OWA for that server.Can I publish it using the same ISA server rule as with the first Exchange server, or do I need to setup its own firewall rule, certificate, DNS name, etc?Thanks,LeoB

Are you running a FE/BE config? If so you can just keep one OWA server, however if you do put up another, then your on the right path, or consider NLB.