SD Improvements in S4
In Business Suite, in SD, the order reason can be defined and while a sales order is created all the order reason appears there but in S4, the order reason can be defined and the same can be assigned to the Sales Doc Type and the Sales Org. When a sales doc is created with that order type and sales org, the assigned order reasons only appears but not all order reasons.
The difference in Business Suite and S4.
In S4, the order reason can be assigned to a order type and to a sales org.
Now create a order.
The order reason only shows the assigned one but not the all.