Configure a Front-End Server
When you configure a server to be a front-end server, you are dedicating the server to receive requests from clients and relay client requests to the appropriate back-end server. After identifying a server as a front-end server, you should remove any unnecessary components that still exist. This will allow the front-end server to relay client requests more efficiently. Components that are unnecessary include the storage groups and routing groups. You should also stop any unnecessary services.
Important If you plan to allow access to Outlook Web Access over the Internet, name your front-end server with its fully qualified domain name (FQDN) and not an internal server name. This ensures Outlook Web Access URLs will work properly for external users.
To configure an Exchange 2000 server as a front-end server:
Note You must create this HTTP virtual server on each back-end server because the front-end server is dedicated to receiving and relaying client requests.
For more information about front-end and back-end configurations, see the "Exchange 2000 Front-End and Back-End Topology" white paper at http://www.microsoft.com/exchange/.