Select whether to include records owned by high-volume community or site users when you create guest user sharing rules. By default, guest user sharing rules include only records that match the rule’s criteria and are owned by authenticated users, guest users, and queues. Because of recent security improvements, this setting is the only way to grant guest users access to records owned by high-volume users. This option isn’t available for owner-based or criteria-based sharing rules.
Where: This change applies to all Aura, LWR, and Visualforce sites accessed through Lightning Experience and Salesforce Classic in Enterprise, Performance, Unlimited, and Developer editions.