Changes to your customer data happen only in The Edge. To refresh your Constant Contact list, perform an upload. Make sure the list is accurate before a promotion goes out. As a guide, periodically refer to your Constant Contact calendar.

If you make changes to your data at the Constant Contact website, those changes will be overridden if you do an upload from The Edge.

Constant Contact uses the email address as the unique identifier. If multiple customers have same email address, only the first customer in the list will be uploaded. If a customer has more than one email address, it will upload only the first email address listed in the customer record.