Planning Your Exchange Client Access Infrastructure
To plan your Exchange client access infrastructure, you must first identify the technical requirements for your Exchange messaging system. After you understand your technical requirements, you can perform a gap analysis and determine what changes must be made to your existing environment, including network infrastructure, hardware, and software upgrades. Additionally, you must understand the basic concepts behind the factors that you need to consider when planning your Exchange infrastructure. Some of these factors are:
Security
Topological boundaries and limitations
Centralized vs. distributed messaging systems
Routing design
Server design and placement
Server sizing and tuning
User requirements
All these factors help you to design the client access infrastructure to meet your messaging requirements. For more information about designing and planning your messaging system, see Planning an Exchange Server 2003 Messaging System.