in classes/output/core_renderer.php [54:63]
public function standard_head_html() {
$output = parent::standard_head_html();
$output .= "<meta http-equiv=\"Content-Security-Policy\" content=\"default-src *; style-src 'self'
'unsafe-inline'; script-src 'self' 'unsafe-inline' 'unsafe-eval' https://statics.teams.microsoft.com;
font-src data: *\">\n";
$output .= "<script src=\"https://statics.teams.microsoft.com/sdk/v1.0/js/MicrosoftTeams.min.js\"></script>\n";
return $output;
}