Yes, that is what I am testing now. In the divert, before routing the message copy, a new RoutingContextImpl is created for it. To this new RoutingContextImpl, the original transaction is picked up from the original context, but currently not the ServerSession.
So I am basically trying this in the divert: newContext.setServerSession(originalContext.getServerSession()); If I do this, auto-creation-check issued from postOffice during routing works according to the destinations auto-create address settings. If the destination does not exist and is not configured for auto-creation an "ActiveMQAddressDoesNotExistException" is returned to the sender.
