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When you go to Profile -> Subsystems -> Container -> JacORB (-full or -ha-full profile needed) to tab Initializer and you try to change Security to on (as it's described in documentation of Transactions http://documentation-devel.engineering.redhat.com/docs/en-US/JBoss_Enterprise_Application_Platform/6.2/html-single/Administration_and_Configuration_Guide/index.html#Configure_the_ORB_for_JTS_Transactions) the change is not provided. No change is visible neither in webconsole nor in XML.
Moving this to component CLI as I found that the command (/profile=full)/subsystem=jacorb/:write-attribute(name=security,value=on) does not work at all.