To better protect your Salesforce data, this update changes how unauthenticated guest access to product records is controlled. To prevent guest users from losing access to products, create and test guest user sharing rules. The Product org-wide sharing default for external users is no longer applied to guest users, and guest user access is set to Private. This setting can’t be changed. This update was first made available in Winter ’22.
Where: This change applies to Lightning Experience and Salesforce Classic in Essentials, Professional, Enterprise, Performance, Unlimited, and Developer editions.
When: The setting Secure guest user record access isn’t applied to products in Winter ’22. Salesforce will enforce this update in Spring ’22.