We want to set up an active/passive Exchange 2000 Serverbased cluster. Can we make one node the mailbox server and run the other node as a front-end server?
No. You can't cluster the IP services required to act as a front-end server; in fact, one of the nicest things about the whole front-end/back-end architecture is that you don't need to cluster front-end servers. Because all they do is proxy inbound client requests to the mailbox server, all front-end servers in an Exchange organization are functionally identical. As a result, if one front-end server fails, you can easily replace it—something that can't be said for nodes in a cluster.