LKBrwn_DBA thanks for the reply.

They launch the application and get a logon screen to enter username/password/datasource

The database is stored on a DB Server. The client application is on a physical or virtual machine.

The legacy system logs in to the database via the ODBC data source. The user can login as long as the user is created in the database and has the correct permissions.

Part of what I was not clear about was what was needed to be installed with Oracle for SSO to work. The OID was not selected when Oracle was installed.
Only the basic selections were made when Oracle was installed. I'm trying to determine what are the missing pieces needed.

Regards,

Pengwen