One of our users is not able to surf over our ISA2004-Server which is configured as internal proxy-server. When the user starts the Internet-Explorer, he is prompted to enter username and password. Normally the username/password is automatically transfered to the isa-server. When the user enters the correct username and password, the isa-server does not accept them. If I enter the credentials of another user on the same computer, everything works fine. In the securitylog of the ISA-Server the following event is logged: Ereignistyp: Fehlerüberw. Ereignisquelle: Security Ereigniskategorie: An-/Abmeldung Ereigniskennung: 529 Datum: 20.11.2008 Zeit: 15:10:30 Benutzer: NT-AUTORITÄTSYSTEM Computer: SERVER-PROXY Beschreibung: Fehlgeschlagene Anmeldung: Grund: Unbekannter Benutzername oder falsches Kennwort (unknown username and password) Benutzername: `��F��+����� �� Domäne: Anmeldetyp: 3 Anmeldevorgang: Advapi Authentifizierungspaket: Negotiate Name der Arbeitsstation: SERVER-PROXY Aufruferbenutzername: NETZWERKDIENST Aufruferdomäne: NT-AUTORITÄT Aufruferanmeldekennung: (0x0,0x3E4) Aufruferprozesskennung: 2332 Übertragene Dienste: - Quellnetzwerkadresse: - Quellport: - It seems like the username is not transfered to the isa-server correctly. The username is illegible !! There are only some strange characters as username. After a restart of the pc of the user everything works fine for about 10-15 minutes. The user does not have problems using network drives, Outlook, network printers ... . What can be the reason for this authentication problem ? I think that the problem is the illegible username, but why is it illegible ? Regards, Martin

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