What does the Retrospectively Apply do?

In the Field Mappings section for each audience, you will find a 'Retrospective Sync' button. This feature allows you to push mapped data between Salesforce and Mailchimp for all members of the current audience. The retrospective sync can be executed in both directions: from Mailchimp to Salesforce and from Salesforce to Mailchimp.

Please note the following:

- The sync will affect all records associated with the subscriber list, based on the selected mapping direction.
- If the retrospective sync is not initiated, the new mappings will only apply to Salesforce Leads and Contacts that are created or updated after the mappings are established.

For further details, please refer to our support documentation: [Field Mappings Support](https://www.beaufort12.com/mailchimp/support/field-mappings).