You can download the following PDF file - a poster, which highlights the architecture and feature set of Microsoft Exchange Server 2010. Apart from showing the high-level architecture, it highlights the feature set of Exchange Server 2010 and sections include:

  • Management and Monitoring
  • High Availability
  • Mailbox Server Role
  • Client Access Server Role
  • Unified Messaging Server Role
  • Hub Transport Server Role
  • Edge Transport Server Role