Your company runs a pooled AVD host pool with Windows 11 Enterprise multi-session. Users complain that during Microsoft Teams calls, audio and video are choppy and CPU usage on session hosts spikes. You confirm Teams is installed per-machine, but you suspect media optimization is not active. When you open Teams and check Settings > About > Version, the connection status shows 'AVD Media not connected.' What is the MOST likely missing component that must be installed to enable Teams media optimization?