I suffered a similar problem, although with a slightly more complex setup. Authentication to the website, using NTLM, worked fine. But an ASP script then queried a backend resource (LDAP directory in this case). For this impersonation/delegation to work, Kerberos would have to be used. The server, client...

I'm generally verbose, tonight I'm going to try and keep this simple: IIS6, intentionally not configured for Kerberos delegation and neither is the W2K3 file server. Each are SP1 (not R2). This configuration has been working just fine and dandy for many months, perhaps over a year... We have...