I have set up a MailChimp account and have an API key. I have updated my settings in Nexternal so that my MailChimp list will be synchronized with the Nexternal customer mailing list. MailChimp shows that Nexternal is communicating properly and my unsubscribes are being marked from MailChimp. MailChimp is sending information to Nexternal, so why is information that is changed or created in Nexternal not being sent to MailChimp?
Every customer record can have multiple "Merge Fields" in MailChimp. Some Merge Fields are sent by Nexternal, such as Customer Number, Last Order Date, First Name, Last Name, and some address information.
Extra merge fields can continue to be used, but they cannot be marked as required if you want new customers to be pushed over from the Nexternal System.