Dynamics provides a backup of production instance going back to 30 days, however, these backups are unavailable for selection if you want to restore the production environment with its own backup which is older than 7 days. The current process for restoring a production instance is to downgrade it to a 'Sandbox' type, the moment that happens you can no longer select the 30 days backup but only the backups of last 7 days. It would be useful to be able to use the backups that are actually available but just aren't visible on the admin portal.