A company wants to capture both customer_id and email_address as identities in their data feeds within the Real-Time customer profile. What is the recommended identity types that should be used for the identities listed above?

In Adobe Experience Platform, identities are categorized using standard namespaces. An emailaddress is a personally identifiable piece of information and should use the standard "Email" identity type. A customerid is typically a system-specific, deterministic identifier (like a CRM ID) used to recognize a customer across different devices and sessions after they authenticate. The "Cross-Device ID" namespace is the appropriate standard type for such an identifier, as its purpose is to link cross-device activity to a single profile.

B. customerid uses a type of Cookie ID; emailaddress uses a type of Device ID: This is incorrect. A customerid is not a cookie, and an email address is not a device-specific identifier.
C. customerid uses a type of Person ID; emailaddress uses a type of Email: "Person ID" is not a standard, out-of-the-box identity namespace in Adobe Experience Platform. "Cross-Device ID" is the correct standard choice.

1. Adobe Experience Platform Documentation, Identity Service. (2023). Identity namespaces overview. "The following table outlines the standard identity namespaces provided by Adobe." The table lists "Email" and "Cross-Device ID" as standard namespaces.

2. Adobe Experience Platform Documentation, Identity Service. (2023). Standard identity namespaces. "Cross-Device ID: Used for identifiers that are deterministic in nature and can be used to identify the same person across devices, such as a CRM ID."