When "Recipient from a source document" is chosen in the Output control folder on a customer for a customer sales order (COA), when reconfirming the order, the email information is retrieved from the first document registered (CASE) on the first item.
This means that the recipients are retrieved from the source document.
If the user wants to change recipients anyway, they can enter manually and delete one of the recipients or add another in the Docby popup.
Nb! If you send a 3. customer sales order acknowledgement, it will pick the recipients information from the first (source) customer sales order (COA), so you will have to manually correct this if you want to remove / add a person to the email list.