Currently with Woo stores, if customer indicates a deliver by date during checkout, we can pass that into Shipstation custom field, but cannot automatically set the native Shipstation Deliver By field using customer’s specified date. The automation rules only allow to set a fixed number of days beyond order date. So our team must manually make the entry from what’s seen in custom field.
Alternatively, open to a direct population of the Deliver By field using custom php in Woo, if that’s an option.