如何在 EWS 中按标志状态过滤电子邮件？

Question

我正在使用 EWS 并尝试查找标记为采取行动的电子邮件（即，它们的 Flag.FlagStatus 属性为“已标记”）。我已经成功地根据主题和其他属性过滤了电子邮件，但我无法理解如何根据 FlagStatus 过滤它们。

在下面的代码中定义$searchFilter 时会出现问题。 该行返回错误

“使用“2”参数调用“FindItems”的异常：“验证 失败的。参数名称：searchFilter""

我尝试过使用 SearchFilter 的其他变体，例如SearchFilter+IsEqualTo，但都返回相同的错误。

Add-Type -Path "C:\Program Files\Microsoft\Exchange\Web Services\2.2\Microsoft.Exchange.WebServices.dll"

$ExchangeVersion = [Microsoft.Exchange.WebServices.Data.ExchangeVersion]::Exchange2010_SP3
$service = New-Object Microsoft.Exchange.WebServices.Data.ExchangeService($ExchangeVersion)
$service.Credentials = New-Object System.Net.NetworkCredential("username","password")
$service.Url = "https://mail.server.net/EWS/Exchange.asmx"

$inbox = [Microsoft.Exchange.WebServices.Data.Folder]::Bind($service,[Microsoft.Exchange.WebServices.Data.WellKnownFolderName]::Inbox)

$propertySet = New-Object Microsoft.Exchange.WebServices.Data.PropertySet([Microsoft.Exchange.WebServices.Data.BasePropertySet]::FirstClassProperties)
$propertySet.RequestedBodyType = [Microsoft.Exchange.WebServices.Data.BodyType]::Text

$searchFilter = New-Object Microsoft.Exchange.WebServices.Data.SearchFilter+ContainsSubstring([Microsoft.Exchange.WebServices.Data.ItemSchema]::Flag.FlagStatus, "Flagged")
$view = New-Object Microsoft.Exchange.WebServices.Data.ItemView(1,0)
$messages = $inbox.FindItems($searchFilter, $view)

foreach ($item in $messages.Items) {
    $item.Load($propertySet)
    write-host $item.Flag.FlagStatus
    write-host $item.Body.Text
}

这个有效：

$searchFilter = New-Object Microsoft.Exchange.WebServices.Data.SearchFilter+ContainsSubstring([Microsoft.Exchange.WebServices.Data.ItemSchema]::Categories, "Blue Category")

这个没有：

$searchFilter = New-Object Microsoft.Exchange.WebServices.Data.SearchFilter+ContainsSubstring([Microsoft.Exchange.WebServices.Data.ItemSchema]::Flag.FlagStatus, "Flagged")

Answer 1

我建议你使用扩展属性而不是强类型属性（无论如何它都是从 ep 派生的），例如

        ExtendedPropertyDefinition PidTagFlagStatus = new ExtendedPropertyDefinition(0x1090, MapiPropertyType.Integer);

        SearchFilter.Exists sfExits = new SearchFilter.Exists(PidTagFlagStatus);

应该努力为您提供任何被标记的消息（例如属性存在），或者您可以更具体地获取后续标记

        SearchFilter.IsEqualTo sfEqualTo = new SearchFilter.IsEqualTo(PidTagFlagStatus, 0x00000002);

在Powershell你需要

 $PidTagFlagStatus = New-Object Microsoft.Exchange.WebServices.Data.ExtendedPropertyDefinition(0x1090, [Microsoft.Exchange.WebServices.Data.MapiPropertyType]::Integer);
 $searchFilter = New-Object Microsoft.Exchange.WebServices.Data.SearchFilter+Exists($PidTagFlagStatus)

或

  $searchFilter = New-Object Microsoft.Exchange.WebServices.Data.SearchFilter+IsEqualTo($PidTagFlagStatus, 0x00000002)