If you want to correlate initial request messages with their combined response messages, you can do so using the ReplyIdentifier in the Properties folder of the response message.
Before you start:
To complete this task, you must have completed the following tasks:
Alternatively, if you are using WebSphere MQ as your transport protocol for your aggregation flows, you can correlate the initial request message with the combined response message by preserving the MsgId from the input MQMD. However, be aware that when the initial request is processed by the fan-out flow, the MsgId held in the MQMD is lost when the MQMD is removed. Therefore if you want to use the MsgId, you must preserve it during your fan-out flow, and store the information in the message somewhere outside the MQMD. For example, you could specify the MsgId as the CorrelId in the aggregated output message. To do this, add a compute node to your fan-out flow that performs this operation.