Issue: With the Oracle Single Sign-On (OSSO) security agent enabled, single sign-on (SSO) fails.
This issue occurs when the Shared Services security settings specify OSSO as the SSO provider or agent and Get Remote user from HTTP request as the SSO mechanism
Solution: Using Oracle Hyperion Shared Services Console, select these security settings:
SSO Provider or Agent–Other
SSO Mechanism–Custom HTTP Header
The default value for the Custom HTTP Header is HYPLOGIN. You can specify a different value.
See “Setting Security Options” in the Oracle Hyperion Enterprise Performance Management System User and Role Security Guide.