Microsoft Exchange Server 2007 Service Pack 1 (SP1) is the latest revision of the Microsoft Exchange products, and is at the heart of the Hosted Messaging and Collaboration version 4.5.

Microsoft Exchange Server 2007 SP1 introduces many new features and technologies that were not available in the release to manufacturing (RTM) version of Exchange Server 2007. These new features and technologies can help increase productivity and reduce administrative overhead. Microsoft Exchange Server 2007 SP1 addresses key hosted features in anywhere access, built-in protection, and operation efficiency. For more information about the new hosted related features and technologies in Exchange 2007 SP1, see the Microsoft Exchange Server 2007 Service Pack 1 white paper. For more information about the new features and technologies in Exchange 2007 SP1, see What's New in Exchange Server 2007 SP1.

This planning documentation provides key information about the new features available with Exchange Server 2007 SP1, including basic concepts and the steps required to install a simple Exchange Server 2007 SP1 organization. This documentation provides you with a walk-through of Exchange Server 2007 SP1 features and functionality.

Use this documentation to help you design a highly reliable and consistently available messaging system. This documentation helps you identify concerns related to network infrastructure, hardware, the Active Directory directory service, and administration before you deploy Exchange Server 2007 SP1 in your hosting organization.