I need to get users running WindowsNT/2K logged into my Oracle 9i DB running on Linux via sqlplus/schema manager.

The Windows users are all in a domain. I can get this to work using local Windows accounts, the problems pop up when I try to get a domain user authenticated to the DB on Linux.

I tried to use OSAUTH_PREFIX_DOMAIN, no luck. I created my user as:

create user my_domain\a_user identified externally;
grant connect, resource to my_domain\a_user;

Other params are set to accomodate OS AUTH:

Can anyone shed light on how to get this accomplished?