Poly Studio X50 MTRoA with new SHARE Button

With latest July 2021 Update of the Microsoft Team Room App for Android Devices (Poly Studio X50 in my Case), I got a new Icon "SHARE" on the TC8 Touch Controller Screen. If I attache a HDMI Cable to the Injection Interface on the Poly Studio X50 Collaboration Bar and press the SHARE Button, I got the Error Message, that there is no HDMI Source connected. Is this Feature official available and is there any specific config on the system config required