Skype for Business - poor sound quality

I do have Fusion 10.0.1 installed on a Mac OS "High Sierra (10.13.1) and on it running a Windows 10 with Skype for Business 2016. I tried every possible setting for my headset, but the sound quality is still very poor....! For the Horizon client there is a virtualization pack for Skype for Business. Does this exists as well for the Fusion client?

Running the same headset with the Skype client on the Mac OS, everything works fine - so it isn't an issue with the installed headset.

Thanks in advance for some feedback.