The two editions of the Configuration Manager 2007 R2 Server ML are differentiated primarily by the server workload running in the OSE being managed. An Enterprise Server ML is required for full application and server desired configuration management, including the proactive management of systems for configuration settings that follow an industry-leading framework for managing information in changing regulatory and business environments, while a Standard Server ML is limited to operating system and basic workload desired configuration management.
The best way to acquire Configuration Manager 2007 R2 MLs is through the Suite offering. The Microsoft System Center Server Management Suites are the comprehensive solution for end-to-end management of physical and virtual server environments, and includes the corresponding edition of the Configuration Manager 2007 R2 Server ML. The Configuration Manager 2007 R2 Client ML is available in the Microsoft Core Client Access License Suite. Alternatively, all Configuration Manager 2007 R2 licenses will are also available on a standalone basis.
For more licensing information, see the Microsoft Licensing Web site.