Being enterprise software, one usually needs considerable expertise and time to obtain optimal performance and functionality. This is especially true for a product as comprehensive and feature rich as Lotus Domino 6.5 which is fully programmable and can provide workflow, knowledge management, document management, archiving, database and collaboration services via a client-server or browser based thin client model.

The arrival of Microsoft Exchange Server 2003 (ES2K3) is a significant event in the history of this product. First, it brings to a close the second era of the codebase. Released back in 1996 on the NT 4 wave, ES4 (there was no 1, 2 or 3) brought enterprise-level email, contact management, diary management and so forth to the Windows Server platform in a new and comprehensive BackOffice application.