Solution : https://service.sap.com/sap/support/notes/645682 (SAP Service marketplace login required)
Key words :
avoid unintentially swapping users, qrfc scheduler works, receiver system, asynchronous message, incoming queues, bx -queues, transaction smqr, relevant user, permanently bind, sending system
Related Notes :
| 369007 | qRFC: Configuration for the QIN Scheduler |