Currently either sales order reservation is:

• manual and user must go through all sales orders / sales order lines to change it to automatic before releasing them the warehouse,
• automatic and stock availability is checked only once, at sales order entry.

It would be helpful to have a periodic task to update sales order line reservation once stock is received. This way backorders could be released to warehouse automatically after the purchase order receipt, and stock won't be reserved too early (marking won't be mandatory on the purchase order and one could change inventory status on locations such as inbound dock or quality control, making stock available only once in storage/picking locations).