What setting must be established to ensure exported profiles always contain an email address?

To ensure that exported profiles always include an email address, establishing mandatory attributes is essential. Mandatory attributes are essentially the core data points that must be present in the profiles and are required to meet specific business or compliance needs. By designating email addresses as mandatory attributes, you enforce the inclusion of this critical information in every exported profile.

In the context of customer data management, email addresses are key for communication and engagement, driving marketing efforts and customer interactions. Therefore, by making email addresses mandatory, organizations can guarantee that every exported profile meets their operational requirements and can be used effectively in various marketing channels.

The other options—optional attributes, audience preferences, and email inclusion settings—do not ensure that email addresses will always be present in the profiles being exported. Optional attributes allow for flexibility and do not require an email address to be included, while audience preferences and email inclusion settings pertain to how data is configured or filtered but do not enforce mandatory inclusion in exported profiles.