Overview
You would like to create an identifier in the LGP database to link the AO and MT of the same message. As an example, you would like to use the same identifier in both AO and MT logs in the DB to retrieve information on AO and MT using one query.
Solution
The field messageFields_userDataHeader can be used to identify the incoming and outgoing messages. If a new field is required then a RFF should be sent to your Account/Sales Manager for a Change Request.