Hello,
For 3CX Hosted there is an AlwaysOn setting notifying the PBX admins (and us) if a backup fails, while for success no email is sent. This cannot be altered, hence no option is shown.
This is inline with the overall concept of Hosted, where we take care of the PBXs maintenance.
Founded in 2005, when VoIP was an emerging technology, 3CX has gone on to establish itself as a global leader in business communications.