Some hosts have no metrics for cdm probe in the USM despite the probe collecting and publishing data.
Windows Server 2016
There is a mismatch between the device and QoS information where the device is discovered with its short name but QoS being published with FQDN.
Configure the cdm probe with 'Send short name for QoS source' and wait until a few data collection cycles have taken place. The metrics should be displayed correctly under the device in the UMP after that.