Solution : https://service.sap.com/sap/support/notes/50646 (SAP Service marketplace login required)
Key words :
customer-specific account assignment fields, create customer-specific fields, additional key words mr44, standard account assignment fields, account-assigned purchase order, account assignment block, financial accounting customizing, purchase order item, purchase order items, field bseg-saknr
Related Notes :
| 73436 | MR44: Final invoice indicator for purchase order |
| 67953 | MR08/MR44: G/L account incorrectly transferred |
| 66706 | MR08/MR44 with order ref., acct assignmnt changable |
| 63859 | MR08/MR44:Order item data in PO assigned to an acct |
| 50780 | MR44/MR08: Customer-specific fields |