如何从Exchange检索与已发送文件夹中的电子邮件相关联的extendedProperties

我们使用以下方法在电子邮件上创建了extendedProperties val uId = getUniqueId();

We have created extendedProperties on emails using val uId = getUniqueId();

val emailExtendedPropDef = new ExtendedPropertyDefinition(uId,"uniqueId", MapiPropertyType.String)
    try {
      email.setExtendedProperty(emailExtendedPropDef, uId.toString)
      email.sendAndSaveCopy()
    } catch {
      case e: Exception =>
        error(s"Exception in setting extended property for user $from", e)
        throw e
    }

现在，我们要遍历已发送文件夹中的电子邮件，并遍历已设置电子邮件的扩展属性

Now we want to iterate over the emails in sent folder and go over the extendedProperties for the emails that have been set

val view = new ItemView(1000)
    var extendedPropertyIndex = 0
    var bodyList = new ListBuffer[String]()
    val propertySet = new PropertySet(BasePropertySet.FirstClassProperties

    try {
      val findResults = service.findItems(WellKnownFolderName.SentItems, view)
      if (findResults.getTotalCount > 0) {
        val iterator = findResults.getItems().iterator()

        while(iterator.hasNext) {

          val item = iterator.next()

          val extendedPropertyCollection = item.getExtendedProperties()

          println("count is "+extendedPropertyCollection.getCount())
          if (extendedPropertyCollection.getCount() > 0)
          {
               //do some processing

          }
       }
     }
    } 

我们能够成功检索项目，但是不确定其扩展属性

尽管我们知道这些项目我们已经使用上述逻辑设置了extendedProperty，但我们一直将计数设为 0 ……

We have been getting the count as 0 eventhough we know for these items we have set the extendedProperty using the above logic ......

如果有人能指出正确的方向，为什么我们收到扩展属性0计数，这也是非常有帮助的，而且我们的要求是检索所有设置了extendedProperties的电子邮件

It will be of great help if someone could point us in the right direction on why we are receiving 0 count for the extended properties and also our requirement is to retrieve all the emails with extendedProperties set

更新:尝试了以下选项

val emailIdPropDef = new ExtendedPropertyDefinition(DefaultExtendedPropertySet.PublicStrings,"uniqueId", MapiPropertyType.String)
    val propertySet = new PropertySet(BasePropertySet.FirstClassProperties, emailIdPropDef)


    view.setPropertySet(propertySet)

但是仍然没有运气，任何朝着正确方向的指针都会有很大帮助

But still no luck any pointer in the right direction will be of great help