Because of this new feature, there are now several new message pages available for customization. The new message pages are: Unregister Confirmation; Unregister Confirmation (for Restricted Dataset); Stay Registered Confirmation, After Unsubscribe from Last List; and Stay Registered Confirmation, After Unsubscribe from Last List (for Restricted Dataset).
When creating the message content for an email job, you can now add a special system drop-in that will direct your subscribers to the External Profile Edit Page. This page will let your subscribers update specific profile fields without logging into the Membership Area. For details on customizing the External Profile Edit Page, see Section 2.9.1
Customizing the External Profile Edit Page.