"D" <anonymous@discussions.microsoft.com> wrote in message
news:0e2801c4d5c1$48560d60$a501280a@phx.gbl...
> We are running an IIS 5 server on a Windows 2000 Server
> using Integrated Windows Authentication to connect to our
> ASP.NET application.
>
> All are able to connect properly except those users
> running IE on a Windows XP platform (both with and without
> SP2). We traced the problem to the use of
> Request.ServerVariables("LOGON_USER").
>
> This is returning an empty string for XP users as it
> appears their logon credentials are not being passed
> properly.
>
> If we switch to Basic or Anonymous authentication
> everything works fine.
>
> Does anyone have any ideas as to what the problem may be?
> I've done a lot of searching but could not find any
> solutions.
>
> TIA.