Final answer:
The claim that all communication with the data subject can be exclusively managed through OneTrust's message portal is false. Other communication methods are often necessary for dealing with complex or sensitive matters.
Step-by-step explanation:
The statement that all communication between the organization and the data subject can be handled via the message portal in OneTrust is False. While OneTrust does provide a centralized platform for privacy management, including communication and data access requests, not all types of communication may be adequately handled through the message portal alone. Organizations often need to employ other communication methods, such as email, phone, or in-person meetings, especially when dealing with complex or sensitive issues.