User Configuration > Administrative Templates > Citrix Components > Citrix Workspace > Remoting client devices > Generic USB Remoting
User
HKCU\Software\Policies\Citrix\ICA Client\USB
Choose whether USB devices that can be connected using alternative HDX technologies should appear in USB Devices list. Devices that can be connected using other HDX technologies include simple USB drives, webcams, scanners, printers, and audio devices. This setting overrides the user's preference.