it uses xdotool to activate the Teams window and mute/toggle the microphone. It puts the mouse back to the position.

muteTeams.sh

function mute() {
    eval $(xdotool getmouselocation --shell)
    pids=$(xdotool search --name "Microsoft Teams" | sort | uniq | head -n 1)
    xdotool windowactivate $pids
    xdotool key "ctrl+shift+m"
    xdotool mousemove --sync $(( 0.1+$X )) $(( 0.1 + $Y ));
}