Yesterday I explained how to get Enterprise User Security (EUS) and Grid Control (GC) to work together. This is without integrating GC with the Oracle Single Sign On Server that would also use the Oracle Internet Directory (OID) for storage of the user credentials.
When a EUS user is logged into GC and the administrator would want to administer a database automatically the preferred credential screen is displayed. The data in this screen is already filled in with the EUS information. The administrator should also be a EUS for that database and then transparently the DBA can administer the database.
This way using an ldap server like the OID and setting up EUS for a hundreds of databases dba's can in a simple way be added and removed from databases.