Connection ID

Clients are identified by a unique connection ID that exists for the duration of the connection and is not reused. This connection ID is encoded into the DriverControl metadata with the key CONNID. This field is set based on the client for all inbound messages.

Reply-type messages automatically get the CONNID of the original outbound message. You can also set the CONNID using UPoCs. If the CONNID for an outbound message is not valid, then the message fails sending and transitions to the error database or send fail procedure.