Which statement about custom fields set to All Users is correct?

The statement that "Only Users under the Custom Field Availability can update the Custom Field" is accurate because it highlights the essence of how custom fields are managed within the platform. When custom fields are configured to be available to "All Users," it means that the fields can be viewed by all users, but only a specified subset of users—those designated under the custom field's availability settings—can edit or update their values. This allows for controlled access and ensures that not every user has the ability to modify the information, maintaining data integrity and compliance with the company's policies.

The correct management of custom fields is crucial for organizations that need to maintain structured and consistent user data, while also providing flexibility in terms of who can make updates. By establishing availability settings, administrators can tailor the customization to meet specific operational needs and user roles.