Trouble with SQLNET.AUTHENTICATION_SERVICES= (NTS)

My company has numerous applications that can connect to our 11g server via TNSNAMES without any trouble. However, a new app was introduced which utilizes Oracle SSO. For this app to connect, users must have SQLNET.AUTHENTICATION_SERVICES= (NTS) set in their SQLNET.ORA file. However, once the users set this, none of the other apps they run can connect to our database. They have to comment out the SQLNET.AUTHENTICATION_SERVICES= (NTS) line in order to connect with the other apps. Is there any way to get all of these apps, the one which uses a SSO connection and then the other regular connection apps, to work together? As is we have to change the SQLNET.AUTHENTICATION_SERVICES setting everytime we go back and forth.

Thank you.
-mcslain

You should specify the domain in every tns names entry, you will then need to update any application that uses those tns names entries. Like you said its all or nothing.