Exchange Server 2007 Design Considerations is a free (registration required) white paper provided by Dell. It's a basic document for beginners, but nevertheless it's worth the reading.
Exchange Server 2007 includes new built-in features and enhancements that enable businesses to suitably meet their ever growing messaging needs. These new features and architectural changes have changed the design and sizing methodologies used with older versions of Exchange. This paper presents a summary of the changes and the potential impacts that it may have on data centers along with some of the design considerations and best practices to keep in mind when deploying or upgrading to Exchange 2007.
Also covered in this technical white paper:
- Exchange 2007 server roles for mailbox, hub transfer, client access, edge transport and unified messaging
- Deployment considerations for high availability, scalability or Consolidation
- Exchange 2007 architectural improvements like 64-bit application Support
- Backup and recovery for Exchange 2007 and much more!
After reading the document, maybe you can play around with Dell Exchange 2007 Advisor.
The Dell Exchange 2007 Advisor tool is designed to help you create an architecture for Exchange deployments by providing a complete view of hardware, software, and Services options. The Tool accepts user specifications, then analyzes, and outputs an Exchange configuration based on performance sizing and Dell recommended best practices.