Solution : https://service.sap.com/sap/support/notes/84286 (SAP Service marketplace login required)
Key words : 
additional key words me90, partner roles/partner addresses, defined partner role, materials requirements planning, ordering addresses, purchasing document, purchase order, ordering address, scheduling agreement, me92rm06enma
Related Notes : 
       
| 69535 | |
| 69492 | Partner roles and message determination |