Hi Sergio, Did you restart the domain controller? Sometimes if you restart the domain controller, it appears that the ISA Server does not reestablish the secure channel with it until you restart the ISA Server. However, I haven't seen the problem since SP1, IIRC. HTH, Tom Thomas W Shinder www.isaserver.org/shinder <http://www.isaserver.org/shinder> ISA Server and Beyond: http://tinyurl.com/1jq1 <http://tinyurl.com/1jq1> Configuring ISA Server: http://tinyurl.com/1llp <http://tinyurl.com/1llp> -----Original Message----- From: sb [mailto:sboticario@xxxxxxxxxxxxx] Sent: Monday, February 03, 2003 12:15 PM To: [ISAserver.org Discussion List] Subject: [isalist] Clients Access to the Internet http://www.ISAserver.org Hi, My question is: At the moment my ISA Server lost the comunication with domain controller to authenticated the access clients to the internet (outbound), how i can find the solution to works well??!? (My clients have to input the credentials to access to the internet and after the weekend the clients input the credentials but doesn't received the connection. Appears the next message:HTTP 407 Proxy Authentication Required - The ISA Server requires authorization to fulfill the request. Access to the Web Proxy service is denied. (12209) Internet Security and Acceleration Server) Thanks Sérgio ------------------------------------------------------ List Archives: http://www.webelists.com/cgi/lyris.pl?enter=isalist ISA Server Newsletter: http://www.isaserver.org/pages/newsletter.asp ISA Server FAQ: http://www.isaserver.org/pages/larticle.asp?type=FAQ ------------------------------------------------------ Exchange Server Resource Site: http://www.msexchange.org/ Windows Security Resource Site: http://www.windowsecurity.com/ Windows 2000/NT Fax Solutions: http://www.ntfaxfaq.com ------------------------------------------------------ You are currently subscribed to this ISAserver.org Discussion List as: tshinder@xxxxxxxxxxxxxxxxxx To unsubscribe send a blank email to $subst('Email.Unsub')