Hi, I have configured one new ISA server 2006 and it is working fine for all domain users. I have some PC which is not part of domain and those PC is used by vendor. I have created some user account on domain controller for vendor and defined the proxy address in workgroup comuter. but now my problem is that work group comuter is not getting the prompt for users name & password. due to that workgroup users are unable to access the internet and getting the message access is denied. Any help will appreciate. Thanks Gayas