Authenticating against Novell.

[Keith]

You're essentially trying to do pass-through NTLM
authentication against NDS. Novell has a solution for
this called "NDS Authentication Services".
Unfortunately, either that product is now wrapped into
something else or at the end of its life.

Here's a link:

http://developer.novell.com/ndk/nds-as.htm

I'd call Novell if I were you and find out the complete
answer.