QAxObject has invalid properties that can not be set either

#include <QApplication>
#include <QAxObject>
#include <QMetaProperty>
#include <QDebug>

void PrintObjectProperties(QObject* const object) {
    auto const metaObject = object->metaObject();

    qDebug() << "Static properties of object" << object << ":";
    for (int i = 0; i < metaObject->propertyCount(); ++i) {
        auto const property = metaObject->property(i);
        qDebug() << "    " << property.name() << "=" << property.read(object);
    }

    qDebug() << "Dynamic properties of object" << object << ":";
    auto const dynamicPropertyNames = object->dynamicPropertyNames();
    for (auto const& dynamicPropertyName: dynamicPropertyNames) {
        qDebug() << "    " << dynamicPropertyName << "=" << object->property(dynamicPropertyName);
    }
}

int main(int argc, char* argv[]) {
    QApplication app(argc, argv);

    auto excel = QAxObject("Excel.Application");
    Q_ASSERT(!excel.isNull());
    auto const set_visible_success = excel.setProperty("Visible", true);
    Q_ASSERT(set_visible_success);

    auto const workbooks = excel.querySubObject("Workbooks");
    Q_ASSERT(workbooks);

    auto const workbook = workbooks->querySubObject("Add()");
    Q_ASSERT(workbook);

    auto const sheets = workbook->querySubObject("Worksheets");
    Q_ASSERT(sheets);

    auto const sheet = sheets->querySubObject("Item(int)", 1);
    Q_ASSERT(sheet);

    auto const pageSetup = sheet->querySubObject("PageSetup");
    Q_ASSERT(pageSetup);

    // Property Orientation is QVariante(invalid)
    PrintObjectProperties(pageSetup);

    // Fail to set Property Orientation
    auto const set_orientation_success = pageSetup->setProperty("Orientation", 2);
    Q_ASSERT(set_orientation_success);
}

Static properties of object QAxObject(0x2f2c20b3fa0) :
     objectName = QVariant(QString, "")
     classContext = QVariant(ulong, 21)
     control = QVariant(QString, "")
     AlignMarginsHeaderFooter = QVariant(bool, true)
     Application = QVariant(IDispatch*, 0x2f2bfd322a8)
     BlackAndWhite = QVariant(bool, false)
     BottomMargin = QVariant(double, 54)
     CenterFooter = QVariant(QString, "")
     CenterFooterPicture = QVariant(IDispatch*, 0x2f2c207a7b8)
     CenterHeader = QVariant(QString, "")
     CenterHeaderPicture = QVariant(IDispatch*, 0x2f2c207abb8)
     CenterHorizontally = QVariant(bool, false)
     CenterVertically = QVariant(bool, false)
     ChartSize = QVariant(Invalid)
     Creator = QVariant(Invalid)
     DifferentFirstPageHeaderFooter = QVariant(bool, false)
     Draft = QVariant(bool, false)
     EvenPage = QVariant(IDispatch*, 0x2f2c207a038)
     FirstPage = QVariant(IDispatch*, 0x2f2c20794b8)
     FirstPageNumber = QVariant(int, -4105)
     FitToPagesTall = QVariant(int, 1)
     FitToPagesWide = QVariant(int, 1)
     FooterMargin = QVariant(double, 21.6)
     HeaderMargin = QVariant(double, 21.6)
     LeftFooter = QVariant(QString, "")
     LeftFooterPicture = QVariant(IDispatch*, 0x2f2c2079f38)
     LeftHeader = QVariant(QString, "")
     LeftHeaderPicture = QVariant(IDispatch*, 0x2f2c207aa38)
     LeftMargin = QVariant(double, 50.4)
     OddAndEvenPagesHeaderFooter = QVariant(bool, false)
     Order = QVariant(Invalid)
     Orientation = QVariant(Invalid)
     Pages = QVariant(IDispatch*, 0x2f2c20796b8)
     PaperSize = QVariant(Invalid)
     Parent = QVariant(IDispatch*, 0x2f2c21d8458)
     PrintArea = QVariant(QString, "")
     PrintComments = QVariant(Invalid)
     PrintErrors = QVariant(Invalid)
     PrintGridlines = QVariant(bool, false)
     PrintHeadings = QVariant(bool, false)
     PrintNotes = QVariant(bool, false)
     PrintQuality = QVariant(QVariantList, QList(QVariant(double, 600), QVariant(double, 600)))
     PrintTitleColumns = QVariant(QString, "")
     PrintTitleRows = QVariant(QString, "")
     RightFooter = QVariant(QString, "")
     RightFooterPicture = QVariant(IDispatch*, 0x2f2c207b1b8)
     RightHeader = QVariant(QString, "")
     RightHeaderPicture = QVariant(IDispatch*, 0x2f2c207a138)
     RightMargin = QVariant(double, 50.4)
     ScaleWithDocHeaderFooter = QVariant(bool, true)
     TopMargin = QVariant(double, 54)
     Zoom = QVariant(int, 100)
Dynamic properties of object QAxObject(0x2f2c20b3fa0) : 

Static properties of object QAxObject(0x22cb5e10420) :
     objectName = QVariant(QString, "")
     AlignMarginsHeaderFooter = QVariant(bool, true)
     Application = QVariant(IDispatch*, )
     BlackAndWhite = QVariant(bool, false)
     BottomMargin = QVariant(double, 56.6929)
     CenterFooter = QVariant(QString, "")
     CenterFooterPicture = QVariant(IDispatch*, )
     CenterHeader = QVariant(QString, "")
     CenterHeaderPicture = QVariant(IDispatch*, )
     CenterHorizontally = QVariant(bool, false)
     CenterVertically = QVariant(bool, false)
     ChartSize = QVariant(int, 0)
     Creator = QVariant(int, 1480803660)
     DifferentFirstPageHeaderFooter = QVariant(bool, false)
     Draft = QVariant(bool, false)
     EvenPage = QVariant(IDispatch*, )
     FirstPage = QVariant(IDispatch*, )
     FirstPageNumber = QVariant(int, -4105)
     FitToPagesTall = QVariant(int, 1)
     FitToPagesWide = QVariant(int, 1)
     FooterMargin = QVariant(double, 21.6)
     HeaderMargin = QVariant(double, 21.6)
     LeftFooter = QVariant(QString, "")
     LeftFooterPicture = QVariant(IDispatch*, )
     LeftHeader = QVariant(QString, "")
     LeftHeaderPicture = QVariant(IDispatch*, )
     LeftMargin = QVariant(double, 50.4)
     OddAndEvenPagesHeaderFooter = QVariant(bool, false)
     Order = QVariant(int, 1)
     Orientation = QVariant(int, 1)
     Pages = QVariant(IDispatch*, )
     PaperSize = QVariant(int, 9)
     Parent = QVariant(IDispatch*, )
     PrintArea = QVariant(QString, "")
     PrintComments = QVariant(int, -4142)
     PrintErrors = QVariant(int, 0)
     PrintGridlines = QVariant(bool, false)
     PrintHeadings = QVariant(bool, false)
     PrintNotes = QVariant(bool, false)
     PrintQuality = QVariant(QVariantList, (QVariant(double, 600), QVariant(double, 600)))
     PrintTitleColumns = QVariant(QString, "")
     PrintTitleRows = QVariant(QString, "")
     RightFooter = QVariant(QString, "")
     RightFooterPicture = QVariant(IDispatch*, )
     RightHeader = QVariant(QString, "")
     RightHeaderPicture = QVariant(IDispatch*, )
     RightMargin = QVariant(double, 50.4)
     ScaleWithDocHeaderFooter = QVariant(bool, true)
     TopMargin = QVariant(double, 56.6929)
     Zoom = QVariant(int, 100)
     control = QVariant(QString, "")
Dynamic properties of object QAxObject(0x22cb5e10420) :