Without ever having done anything like it, two ideas come to my mind. First would be SingleSignOn, but that requires modifications on all containers, which is probably not what you want. The second, and maybe more practical approach would be InterPortletCommunication via PortletEvents as described in the docs (http://docs.jboss.com/jbportal/v2.7.1/referenceGuide/html/portalapi.html#...). Once you receive a certain event, your portlets could invalidate their corresponding session. Maybe it helps :) Regards Phil View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4254340#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...