I'm working with Atrex 19, and am building a conversion pipeline for our quotes, orders, and invoices. I'd like to track how many of our quotes get converted into orders or invoices. 

I see invoices link to orders using invoice.OrderNum. This field is sometimes 0, which I'm assuming means that this invoice was created directly from a quote. I had assumed that the ord.Reference field was used for tracking this information, but that seems to be a free text field on the front end. 

Does Atrex provide some way to link the quotes to orders and invoices, or do we need to manually provide that linkage?