
I only see Invoice Payments from the related list on Work Orders. I want to see Invoices instead. It seems strange that this relationship does not exist OOB. What is the best way to access Invoices from the Work Order?
Do you have the Work Order listed on the Invoice as a lookup field?
Create a WO lookup field on the Invoice form then create a workflow to populate the field from the WO. This will allow you to see Invoices from WO.