We've had a single Exchange server behind an ISA for awhile. OWA was set up with certificates yada yada. Well. We added a new Exhagne server and anyone on said new server cannot get thier webmail. I created a new certificate for the new exchange server and hooked the certificate onto the ISA server with a new listener. However all requests for the old domain name seemed to want the new certificate. I jiggled a few settings and got the original cert back but is there a was I can trick ISA into allowing both servers to pass through. What if I instaled the older certificate into the new exchange server IIS?