Big Business 11.20 allows systems for EDI to post back transaction updates, which automatically update this checkbox.
This solution provides details. (6889)
Big Business 11.20 updates Middleware to include return fields for EDI including:
To use these insert a new Record in the ShipInfo table in Middleware, and be sure to put in an Invoice Number that you want updated.
Filling in any of these fields will the set the EDI Checkbox, so you know the invoice has been sent via EDI, and can search for these in Invoices Search.
These fields also create an entry in Shipment Information with a description including "Sent EDI" and the Date and Reference information posted.