What is required for a record in salesforce to be synced or created as a...

The only required field for a record in Salesforce to be synced or created as a prospect record in Marketing Cloud Account Engagement is the email address. Marketing Cloud Account Engagement uses the email address as the unique identifier for prospects, so it is mandatory for any record to sync between the two platforms. Other fields, such as name, company, or phone, are optional and can be mapped between Marketing Cloud Account Engagement and Salesforce, but they are not required for the sync to happen. For more details —> 123