In journey builder I am using API event (as entry source). Whenever the event occurs the Orders DE gets populated that has 2 fields : customer_ID & order_id and then this Orders DE enters into the journey. I have linked Orders DE with Customer DE in Data Designer by creating an attribute group.
My question is how can I send emails in the journey if Orders DE does not have email attribute? Can the journey take the email attribute from Customer DE if its linked in Data Designer ?