This event is triggered when a user session is removed due to a user logging out explicitly, session timeout, session terminated by administrator, or session deleted by an iRule.
In TMOS versions 11.5.1+ you may use “ACCESS::session data get” commands in this event. When the event has concluded session data will be expunged.
Important: This event is triggerred outside of flow context (similar to RULE_INIT) when a session goes away. The iRule commands which require a flow context (for e.g. TCP, HTTP and SSL commands) can not be used in this event.
This event is a complementary event to the ACCESS_SESSION_STARTED event.