We have customer ID ....-02 which uses our webshop. This customer ID is directly related to ....-01
Orderconfirmation is not only send to emailadress which is username, but is also send to emailadress which is there in our ERP.
Customer doesn't like this because ID ....-01 is only for invoices, so is mailadress invoice@....com
For Sana it is out-of-standard behavior to send orderconfirmation only to emailadress which is username for log-in in webshop.
Just send orderconfirmation to only one emailadress in stead of two because of second emailadress from redirection to another customer ID should be a solution.