We have a single Exchange 2003 server (no Front-end obviously) setup for RPC over HTTPS and it has been working fine for about 300 remote Outlook users.
Soon we will be installing a 2nd Exchange server in the same organization and then move some of these mailboxes there. I intend to modify ValidPorts subkey in registry on the first Exchange server, where OWA/RPCproxy is located, to include information about the new Exchange server.
It is my understanding that remote Outlooks need not be touched. They should be automatically redirected to the new Exchange server if their mailboxes have moved there. I need confirmation of this. Thanks.