This option is only available in Akeeba Backup Professional.
To schedule a backup upload failure check, you will have to use the following command line to your host's CRON interface:
/usr/local/bin/php
/home/USER/webroot
/cli/joomla.php akeeba:backup:check:upload
where /usr/local/bin/php
is the path to your PHP CLI executable and /home/USER/webroot
is the absolute path to your web site's root. You can get this information from your host.
The same considerations and scheduling information as the backup CRON script apply.