Authentication with Active Directory

Hi all,I've read a lot of documentation and it seems that the only way to authenticate an application on Forms 11g via Microsoft Active Directory is using also OID. Is that correct?

I understand that Oracle may say that this is the best practice, but isn't it possible to authenticate on AD in some other way?

Is it possible to "capture" session information like osuser and use it for example via DBMS_LDAP?

I am not interested in Single Sign On, since I have only one application that runs on Fusion Middleware and it uses only Forms. I only would like that calling the url of my application in a browser directly opens the session.