Hello, I'm using Longhorn Server Technet Build 6001 (February CTP). I want to use Network Access Protection based on DHCP. So I created Connection Request Policies, Network Policies and Health policies, configured the System Health Validators ans specified a Remedation Server Group. The next step would be to enforce the options on the DHCP scope in DHCP server properties. When I press the button "Enable on all scopes" on the NAP tab of IPv4 Properties of the DHCP Server I get an error message: "NAP is not enforced by DHCP server as the specified IAS Server could not be reached" I have not specified an IAS Server anywhere. The Network Policy Server is on the same machine as the ADS and the DHCP Server! What am I missing?` Thank you, Shrek