QSaveFile unable to open UNC path to write on Windows

    QString path = QString( "\\\\drive\\dir\\myfile.txt" );
    qDebug() << "path=" << path;
    QFile f2( path );
    if ( f2.open( QIODevice::WriteOnly | QIODevice::Truncate | QIODevice::Text ) )
    {
        qDebug() << "QFile ok";
    }
    else
    {
        qDebug() << "QFile f.error()=" << f2.error();
        qDebug() << "QFile f.errorString()=" << f2.errorString();
    }

    QSaveFile f( path );
    if ( f.open( QIODevice::WriteOnly | QIODevice::Truncate | QIODevice::Text ) )
    {
        qDebug() << "QSaveFile ok";
    }
    else
    {
        qDebug() << "QSaveFile f.error()=" << f.error();
        qDebug() << "QSaveFile f.errorString()=" << f.errorString();
    }