This blog is in continuation of following blog where we spoke about costing issue if quantity is changed at purchase order invoice form;
To restrict changing the quantity at PO Invoice form at lines level, refer the following set up;
Accounts payable – Set up – Accounts payable parameters – Invoice validation
Select checkbox field ‘Enable invoice matching validation’
For ‘Post invoice with discrepancies’ field, select drop down field value as ‘Require approval’.
If both the validations are done, users will not be allowed to change the item quantity at PO invoice form.