To safeguard your Salesforce org’s data, we’re enabling the Secure guest user record access setting. This setting enforces private org-wide defaults for guest users and restricts the sharing mechanisms that you can use to grant record access to guest users. To prepare, follow the instructions in the Secure Guest Users’ Org-Wide Defaults and Sharing Model security alert on reviewing guest user sharing settings and creating guest user sharing rules.
Where: This change applies to orgs with active communities and sites in Enterprise, Essentials, Unlimited, Performance, and Developer editions.
When: The timelines for the rollout and enforcement of this setting are published in Guest User Security Policies and Timelines.