I know that xlang schedule 2004 needs some account to run under.
I use a domain account that has admin right to the domain.
Now, I have an orchestration in biztalk 2004 calling some web service.
If I use anonymous authentication for the web service virtual directory, the orchestration works fine.

If I use windows authentication (that should authentication the admin account I run Xlang under), the orchestration failed!!! The event logs specially said the error is due to the web service virtual directory permission.

Do you know why? Logically, my set up should work, but it does not.

Thanks,
Hung

If IIS is setup to allow anonymous authentication (which is what it sounds like in your example), even if you try to use Windows authentication it will run with the anonymous account. In IIS, you need to uncheck the "Anonymous Access" directory security checkbox.