I have a problem. My old configuration: - 1 PDC (SRV1) WinNT 4 Server in Domain A - User registered: USERA with psw 'test' - 1 PDC (SRV2) WinNT 4 Server in Domain B - User registered USERA with psw 'test' On SRV2 i installed Proxy Srv2 and USERA authorized to internet connection. The user USERA is join witn DOMAIN A and it is connect to internet across Proxy on SRV2. In this mode, USERA run Internet Explorer and it not display requeste login, because the USERA is registered in Domain B also with identical psw. My New configuration - 1 PDC (SRV1) WinNT 4 Server in Domain A - User registered: USERA with psw 'test' - 1 DC (SRV2) Win2000 SP2 Server in Domain B - User registered: USERA with psw 'test' On SRV 2 i installed ISA Srv and USERA authorized to internet connection. In any configuration of authentication pannel propriety of ISA, internet explorer display the requeste login... It possible don't dispaly this prompt for user autorized? This problem not occur if USERA if join to DOMAIN B: the requeste login appear with user not autorizated only.... Thanks.