How and when is the value of the field Maximum Quantity (whinh200.maxt) in Warehousing Order header updated? I have seen the standard field help regarding Over Delivery, but in my case Over Delivery is zero and so the Maximum Quantity should be 100%. But it is zero for a particular Sales Order.

Can anybody help me in understanding why it becomes zero.

I have been away from LN for a while, but as I recall, the warehouse item record would require a checkmark to use the warehouse item data if it to use any of the warehouse item defaults. It would revert to the item data maximum quantity if the Use Warehouse Item data record is not checked.