Changing a customer's purchase order number
If Yes is selected for the Allow Access to Maintain Cust PO # field on your operator record, you can change a customer's PO number on a sales order after the order has been shipped or invoiced. The PO number cannot be cleared if the customer on the order requires purchase orders. If activated in SA Event Manager Activate Event, an event triggers a notification to the designated operator when the PO number is changed.