Unmanaged computers
You can view your computers that don't have Sophos Device Encryption installed.
To find computers that don't have Device Encryption installed, go to Devices > Computers and select Computers without Device Encryption in the protection type filter.
If you set up synchronization with Active Directory, you must also go to Devices > Unmanaged devices. This shows you devices synced from Active Directory that don't have any Sophos protection.