Webcamera not working in horizon desktops

Hi,

we currently have an on-premise horizon plattaform running on version 7.11.

The desktops are delivered via instant clones.

The main problem we have is the web camera is showing black and this is important for us because all users are using Microsoft Teams and working remotely.

We tried with several devices (laptops, mobile phones...) and the result is always the same...  the camera is detected but not showing.

Tested with differente horizon client software versions, last 5.4.3 to 5.3.0

any advices or recomendations for check?

Thank you in advance!

Juan