In some cases, an unexplained change may occur to a Sales Order. How to view the history of a sales order.
In the Supply Chain client, go to Stock and then Stock History
Enter the part number you would like to look up on the order, then click Save
In the Works / Purchase / Sales column, click the column filter icon and select Ends With
Enter the order number into the column header
This history for the order and part combination will be displayed, including who made the change and when. The Type column details the nature of the change, with a full list of codes being available by clicking the Codes button.