Windows 10 comes with a 'Notifications and Actions' settings area. Each application that generates a toast notification creates an entry in the 'Notifications and Actions' database when the notification is generated. This includes Macrium Reflect when a backup, restore or clone is started, and when updates are available and notifications are configured .
An example of a 'Update Available' notification
An example of a 'Backup Started' notification.
Notifications can be enabled and disabled in 'Notifications and actions settings'
To start the Notifications and Actions setting window type "Notifications and actions' in the Windows search bar and select 'Notifications and actions settings' in the results list.
Scroll down to locate 'Macrium Reflect'
Make sure that the the option is 'On' to see notifications.