[June 7, 2012 Update: Corrected typo in "Supported Configurations" section]
Oracle E-Business Suite comes with native user authentication and management capabilities out-of-the-box. If you need more-advanced features, it's also possible to integrate it with Oracle Internet Directory and Oracle Single Sign-On or Oracle Access Manager, which allows you to link the E-Business Suite with third-party tools like Microsoft Active Directory, Windows Kerberos, and CA Netegrity SiteMinder.
For details about third-party integration architectures, see either of these article for EBS 11i and 12:
Oracle Internet Directory 188.8.131.52.0 can be integrated with two single sign-on solutions for EBS environments:
Oracle Access Manager strongly recommended
Oracle has two single sign-on solutions: Oracle Single Sign-On Server (OSSO) and Oracle Access Manager (OAM). Oracle strongly recommends that all new single sign-on implementations use Oracle Access Manager. Oracle Access Manager is the preferred solution going forward, and forms the basis of Oracle Fusion Middleware 11g. OSSO is no longer being actively developed and will not be ported to Oracle WebLogic Server.
Oracle Internet Directory is certified to run on any operating system for which Oracle WebLogic Server 11g is certified. Refer to the Oracle Fusion Middleware 11g System Requirements for more details. For information on operating systems supported by Oracle Internet Directory and its components, refer to the Oracle Identity and Access Management 11gR1 certification matrix. Integration with Oracle Internet Directory involves components spanning several different suites of Oracle products. There are no restrictions on which platform any particular component may be installed so long as the platform is supported for that component. References