Dont allow partial Allocation of Stock item

Hi ​@ranjithduraisamy72 

You use the Access Rights feature and assign permissions to the "Qty to Allocate" field for View Only.

Please refer to the screenshots below.

Best Regards,

NNT

There is a setting in Order Types, on the Template tab that controls whether or not inventory will be hard allocated during sales order entry.  Please check if this is what is doing those partial allocations  If you don’t want to allocate any stock during sales order entry, uncheck this and then you can use the Manage Sales Allocations for divvying up the inventory across your sales order lines. 

Dana