Microsoft Internet Security and Acceleration (ISA) Server 2006 Standard Edition and ISA Server 2004 Standard Edition do not support Network Load Balancing (NLB) functionality. The NLB feature is included in ISA Server 2006 Enterprise Edition and in ISA Server 2004 Enterprise Edition.
For more information about how to troubleshoot unsupported configurations in ISA Server, visit the following Microsoft Web site:
For more information about the NLB feature that is included in ISA Server Enterprise Edition, visit the following Microsoft Web site:
For more information about Network Load Balancing, search on "network load balancing" in ISA Server Help.