读取 Azure 信息保护统一标签客户端在 Outlook 电子邮件中设置的 Internet headers

Question

我正在使用 Azure 信息保护统一标签客户端来标记电子邮件。我们仍在我们的环境中使用 PGP，严格保密的电子邮件必须经过 PGP 加密。

当邮件发送时，我试图找出邮件是如何分类并触发PGP加密的，分类是严格保密的。这是在 Outlook VSTO c# Add-in.

中完成的

为了找出分类，我阅读了由 AIP 设置并包含所有必要信息的电子邮件 header 属性 "msip_labels"。我正在使用以下过程来读取 headers。代码远非完美。我只是想知道如何获得价值。:

private void GetHeaders()
{
    var mail = (Outlook.MailItem)Application.ActiveInspector().CurrentItem;
    var propertyAccessor = mail.PropertyAccessor;
    try
    {
        var custom = propertyAccessor.GetProperty("http://schemas.microsoft.com/mapi/string/{00020386-0000-0000-C000-000000000046}/msip_labels");
    }
    catch(Exception ex) 
    {
        var message = ex.Message;
    }
}

我能够读取由另一个工具设置的属性，但是 AIP 属性是多行的。执行代码时，出现错误：Typeconflict。（HRESULT 异常：0x80020005 (DISP_E_TYPEMISMATCH)）

有没有办法读取多值属性？这是 msip_labels 属性的示例（GUID 替换为 XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX）：

msip_labels: MSIP_Label_XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX_Enabled=true;
 MSIP_Label_XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX_SetDate=2019-11-14T07:16:38Z;
 MSIP_Label_XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX_Method=Privileged;
 MSIP_Label_XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX_Name=XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX;
 MSIP_Label_XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX_SiteId=XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX;
 MSIP_Label_XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX_ActionId=XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX;
 MSIP_Label_XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX_ContentBits=1
msip_label_XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX_enabled: true
msip_label_XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX_setdate: 2019-11-14T07:16:48Z
msip_label_XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX_method: Privileged
msip_label_XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX_name:
 XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX
msip_label_XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX_siteid:
 XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX
msip_label_XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX_actionid:
 XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX
msip_label_XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX_contentbits: 0

Answer 1

我终于想通了，如何创建属性架构字符串，使其 returns 成为正确的数据类型。使用 Outlook Spy 分析项目有助于找出数据类型。用于查询 msip_labels 的具有正确架构字符串的正确代码行是：

var mSIPLabels = propertyAccessor.GetProperty("http://schemas.microsoft.com/mapi/string/{00020386-0000-0000-C000-000000000046}/msip_labels/0x0000001F") as string;

在属性名称之后，我必须传递类型描述符 0x0000001F

读取 Azure 信息保护统一标签客户端在 Outlook 电子邮件中设置的 Internet headers

Reading internet headers set in an Outlook email by Azure Information Protection Unified Labeling Client

c#

vsto

outlook-addin

azure-information-protection