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I have a few subscribers who has changed their email addresses in our system which has been reflected in synchronized data extensions in Marketing Cloud. On email send SFMC is sending email to their old email addresses. Upon investigation, I found that All Subscribers data has not been updated with the new email address for the subscribers who changed their email addresses in Salesforce Cloud (CRM).
Please find below the details for one of the records.
Subscriber Key: 000000000000BBBAA1 New Email address (changed on 13/12/2016): NEW@test.com Old Email address: OLD@test.com
I have raised a case with SFMC and they came up with a solution to enable the business rule in our account to update the records in All subscribers data as soon as the record is updated in CRM.
Can someone help me to understand the impact of this business rule going forward?