In order to get Backup Radar to successfully monitor your Datto SaaS Protection / Backupify notifications you will need to login to the Datto Partner Portal to direct the email notifications to your @backupradar.net mailbox.
In the Datto Partner Portal, click the Status tab, then select SaaS Protection Status from the drop-down menu.
From here, select the Backups tab at the top of the page, then click Reporting.
In the next Dialog box you will need to enter your @backupradar.net mailbox address to get the backups to show up for activation in Backup Radar.
Further setup information can be found in Datto's Knowledge Base: