hello I was able to configure kerberos
I followed this guide of the help
http://help.adobe.com/en_US/livecycle/9.0/adminHelp/000049.html#1548323
now as I go on?? I've got to be automatically authenticate a user accessing the server, where I installed LiveCycle
in adminui
Home > Services > User Management > Configuration > Portal Configuration
the setting "Enable portal Single Sign-On (SSO):" I just http header in the dropdown menu
