From the home screen of MyFrontpoint.com
Click on the Notifications section in the menu options on the left side of the screen.
Click on the +New Notification button to create a new notification and select Sensor Activity from the list. From here you can check the boxes next to any sensors you would to receive notifications for.
click on +Add Recipients to select which phone numbers, emails or push devices you would like to receive the notification. You can also use the During this time frame: section to limit by times of day or days of the week that you will receive the notifications.
Click Save when done