Solution : https://service.sap.com/sap/support/notes/338021 (SAP Service marketplace login required)
Key words :
transaction okkp > activate components/control indicators, initialize fields cobl-kdauf, additional key words, real account assignment, auxiliary account assignment, account assignment logic, actual account assignment, adjustable message ki162, deactivating message ki162, billing item assigns
Related Notes :
| 397239 | INFO:CO-OM Interface/actual postings/commitment/down payment |
| 155984 | KI235 if sales orders not active in contrlng area |