To configure Shared Services, see “Configuring OID, Active Directory, and Other LDAP-based User Directories” in the Oracle Hyperion Enterprise Performance Management User and Role Security Guide.
For development purposes, Shared Services can be configured to use the WebLogic embedded LDAP server as an external directory. For information, go to: http://www.oracle.com/technetwork/middleware/bi-foundation/resource-library-090986.html and select EPM System Tips & Tricks 1-72 (PDF). In that document, see "Is it possible to use the WebLogic embedded LDAP server as an external directory for EPM System 11.1.2 products?".