Description: This solution describes how to opt-in contacts for GDPR while processing the records to Mailchimp
By default, when sending over new contacts Mailchimp marks them as opt-out if you have GDPR settings enabled. However, if the marketing permissions are mapped during processing then the contacts will be opted-in.
NOTE: Any existing contacts that are already marked as opt-in will not be overwritten to be opt-out.
1. On the Data Mapping page, expand the section for Members/Marketing Permissions
2. To opt-in, select Defined and enter True