Hi OpenPJ
I've tried all in that guide but nothing works. I don't know if Alfresco is blocking headers from OpenAM in another level because Cookies are working ok although cookies is not the goal for SSO.
If you've any tip beside documentation please let me know, because it's the only thing is missing for this integration, and there is not an official guide or a blog for someone who did this job.
I found some posts in this forum but there is no way to Alfresco get these headers.
Thanks for your help OpenPJ.