if (checkDomain)
{
    m_configuration.CertificateValidator.Validate(serverCertificateChain, m_endpoint);
    //Modification - Begin
    // verify if applicationUri from ApplicationDescription matches the applicationUri in the client certificate.
    string certificateApplicationUri = X509Utils.GetApplicationUriFromCertificate(serverCertificate);
    if (!String.IsNullOrEmpty(certificateApplicationUri) &&
        !String.IsNullOrEmpty(m_endpoint.Description.Server.ApplicationUri))
    {

        if (certificateApplicationUri != m_endpoint.Description.Server.ApplicationUri)
            throw new Exception(
                string.Format("Server certificate is refused. The applicationUri does not match:" +
                "-Certificate applicationUri='{0}', -EndpointDescription applicationUri='{1}'",
                certificateApplicationUri, m_endpoint.Description.Server.ApplicationUri));
        else
            throw new Exception(
                string.Format("Server certificate is refused. Server certificate is refused, the applicationUri " +
                "in the certificate or in the endpoint description is null."));
    }
    //Modification - End
}
else
{
    m_configuration.CertificateValidator.Validate(serverCertificateChain);
}