include_once("phpmailer/PHPMailerAutoload.php");

$account="xxxxxxx@xxxxxxxx.com";
$password="xxxx";

if (!isset($mail)) {
    $mail = new PHPMailer();
    $mail->SMTPDebug = 2;
    $mail->IsSMTP();
    $mail->CharSet = "UTF-8";
    $mail->Host = "smtp.office365.com";
    $mail->SMTPAuth= true;
    $mail->Port = 587;
    $mail->From = $account;
    $mail->Username= $account;
    $mail->Password= $password;
    $mail->SMTPSecure = 'tls';
    $mail->SMTPOptions = array(
        'ssl' => array(
            'verify_peer' => false,
            'verify_peer_name' => false,
            'allow_self_signed' => true
        )
    );
}

$mail->ClearAllRecipients();
$to = 'xxxxxxxxx@gmail.com';
$nombre = 'to';
$mail->addAddress($to, $nombre);
$mail->FromName = "ENTERPRISE";
$mail->isHTML(true);
$mail->Subject = 'SUBJECT: TEST';
$cuerpo = 'TEST';
$mail->MsgHTML($body);
$mail->Body    = $body;
$mail->AltBody = 'TEST';

if(!$mail->send()) {
    echo 'Mailer Error: ' . $mail->ErrorInfo;
} else {
    echo true;
}