Do you need SFMC Support to change the current subscriber id field from one existing field to another, no data migration or changes. And if so, is this still considered a rekey?

Context: We are currently using the SF Contact ID as Subscriber Key, but wish to change to a custom object field. We are not using the standard Salesforce sync, my team built a data service that sends a flat-file to MC FTP, which is then added to data extension.

Thanks to all who view or respond!

1 Answer 1


My Salesforce Marketing Cloud AE has confirmed this is a Subscriber Rekey that only they can fulfill.

Thanks to all who viewed and considered my question!

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