Customer Item Cross Reference (BL04.1)
Use Customer Item Cross Reference (BL04.1) to cross-reference your item number with your customer's number for that item. When your item numbers are cross-referenced with your customer's item numbers, both numbers appear on invoices. This makes reporting easier for your customers.
Note: To define a cross-reference item that is shared by all customers, leave the Customer field blank when running BL04.1.