How to investigate a field with no "DB Field" specified?

Epicor ERP 10
,
1

Hello Everyone,
I received a complaint that the bill-to customer email address is no longer showing up on invoices. It is entered on the sales order and used to show up on the invoice until recently.
The crystal report for the invoice has not changed so I went to field help, see picture below. I saw that this is one of those special fields that does not have anything under “DB Field”. I have experience writing BPM’s and BAQ’s but I have no idea where to start with figuring out why this field is not working. Any suggestions are greatly appreciated.

Thank you!

2

That would be linked to the OrderHed.BTCustNum, that customer then linked to the CustCnt.EmailAddress where you might be missing the information. If only the Invoice is missing the information then there might be a field that needs to be added. Have you checked all the calculated email addresses on the query to see if one of them is the one that shows up on the order?