iCloud+ Hide My Email addresses will remain on icloud.com

Apple is migrating new Sign in with Apple email addresses from privaterelay.appleid.com to private.icloud.com starting later in 2026, while maintaining backward compatibility with existing addresses. IT organizations must update email validation logic, allowlists, and account systems to accept both domains to prevent authentication failures and user access disruptions. This change impacts identity and access management strategies across applications and requires coordinated technical updates to prevent service degradation.