According to this MS Documentation:
https://docs.microsoft.com/en-us/virtualization/hyper-v-on-windows/reference/integration-services

The hv_fcopy_daemon have a low impact on VM.
The role of this daemon isn't necessary to a Azure VM, as you will not use it 
to copy files from/to VM (This could be necessary if you are directly on 
Hyper-V Console )

Looking into debian sources: 
https://sources.debian.org/src/linux/5.0.2-1~exp1/debian/hyperv-daemons.hv-fcopy-daemon.service/

You will see that a different condition exist to run this service daemon:
ConditionPathExists=/dev/vmbus/hv_fcopy

So just add this extra condition to ubuntu service description on 
/lib/systemd/system/hv-fcopy-daemon.service

Restart your VM and you will see it is no more degraded.

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https://bugs.launchpad.net/bugs/1766300

Title:
  hv-fcopy-daemon service fails to start if /dev/vmbus/hv_fcopy doesn't
  exist

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