- Ensure that Subscription Order Generation is Enabled. Under System > Configuration > Subscription Settings, check the Enable Daily Subscription Order Generation checkbox.
Ensure that Upcoming Subscription Order transactional email is NOT Disabled. Under System > Configuration > Email Settings, uncheck the Disable Email: upcoming_subscription_order checkbox.
Set the number of days ahead of the upcoming order date which the email notification should be sent to your customer. Under System > Configuration > Email Settings, set the Send Email n Days Ahead of Order setting. The default value is 2 days ahead.
Set the time of day for sending Upcoming Order emails. Under System > Configuration > Email Settings, set the Send Email At time setting to the correct time of day. NOTE: This setting is set in UTC time.