We are thinking about using the OID "External Authentication Plug-in" to use credentials stored in Active Directory. http://docs.oracle.com/cd/E28280_01/admin.1111/e10029/plugin_cust_ext_auth.htm#OIDAG072 Anyone having experience with this external plug-in? Is it stable, reliable and performant? Does it work out-of-the box? Thanks, Markus