Why This Chapter Matters

With the constant evolution of technology and the marketplace competition to produce better products, companies continually evaluate their needs against their current technologies to determine whether it is necessary to update to a newer version of a product they are already running or to migrate to another vendor's competing product. This is especially true in the realm of messaging and collaboration—network services that are "mission critical" for most organizations. As a network or Exchange administrator, you will likely find yourself in a position of influence over technology purchases for upgrades and migrations, which are exceedingly common. Therefore, it is very important to know how to migrate other messaging systems to Exchange Server 2003 and to know how to configure Exchange Server 2003 to coexist with other messaging systems that an organization might use.