This summer, we will be releasing Microsoft Internet Security and Acceleration (ISA) Server 2006 Service Pack (SP) 1. This Service Pack introduces new features and improved functionality for ISA Server 2006 Enterprise and Standard Editions. The new features focus primarily on enhanced troubleshooting mechanisms designed to help you identify and resolve ISA Server configuration issues.
ISA Server 2006 SP1 includes the following new features:
There's lots more detail here, including screenshots:
Service Pack 1, a very nice new features too iyimiş development
new features were very useful, thanks.