Solution : https://service.sap.com/sap/support/notes/574630 (SAP Service marketplace login required)
Key words :
purchase order item assigned, account assignment table eskn, order account assignment, po account assignment, multiple account assignment, online transaction ml81n, service entry sheet, terms eskn, item category, individual service
Related Notes :
| 670392 | ME21N:Account assignmt incorrectly transferred from ref. doc |