Hi,
Can you articulate your requirements with more clarity ?
Why is this requirement in such a way ? How does it matter which Storage Location the Material is coming from as long as it is the same material ?
Coming to standard SAP, Shipping Point is determined from a combination of :
-> Plant +
-> Shipping Condition [ default from Customer Master / can be changed in Sales Order ] +
-> Loading Group [ default from Material Master ]
There is no direct need to input Storage Location in the Sales Order.
Thanks.