We are running LiveCycle 8.2 on a WebSphere 6.1 application server. I have enabled SSO via the Adminui under Portal Configuration in User Management. My settings are:
Enable portal Single Sign-on (SSO): Yes
SSO Type: HTTP Header
HTTP header for unique identifier: uid
HTTP header for domain: {empty}
Domain mapping: {empty}
When accessing /adminui or /workspace the user is automatically logged in without being redirected to the login page. When trying to navigate to /ReaderExtensions the login screen is displayed. Is SSO not possible for Reader Extensions? Does something else have to be configured?