We need to setup Envelope Journaling and would like to configure and test this on our production AD 2003 domain but not on our production Exchange 2003 server. We would like to install a second Exchange server on our domain to test this on but this server does not need to be in our current Exchange Organization and does not need to communicate to our existing production Exchange server. We will configure this to send and receive it's own email. Are there any caveats to installing a second Exchange server in our environment? I want to assure that doing so will not cause any problems with our current Exchange server.