Changes in RPC client/server behavior in Windows Server 2003 Service Pack 1 cause the ISA Server RPC filter to deny RPC access to computers running Windows Server 2003 with Service Pack 1. Install this update to fix this compatibility issue. Windows Server 2003 Service Pack 1 makes significant changes to the Remote Procedure Call (RPC) service with the addition of registry keys, including the ability to enable users to modify the behavior of all RPC interfaces on the system, and eliminate remote anonymous access to RPC interfaces on the system (with some exceptions).
New RPC features are not supported by ISA Servers RPC filter and such RPC traffic fails through ISA Server. This update fixes these RPC issues in ISA Server 2000. This version is the first release on CNET Download.com.