Due to the 999 entry restriction we cannot maintain more than 999 ship to party in the sold to customer master data, to overcome this problem we have implemented a workaround, We don’t maintain the ship to party in the sold to party customer data , but we maintain the sold to party in the Ship to customer master data. Hence while entering the Sales order, business is supposed to enter the ship to party field and we expect the sold to party to be determined. This doesn’t happen in the standard way so our plan is to use the partner determination user exit to get the Sold to party master data. I understand that in order to use the partner determination user exit EXIT_SAPLV09A_003 we need to make some changes in the configuration of partner determination procedure as well (source X, Y or Z in partner determination procedure, transaction VOPA). Is there any other changes required which needs to be done.