PR_INTERNET_MESSAGE_ID在发送消息时返回空白 [英] PR_INTERNET_MESSAGE_ID returns blank when sending message

问题描述

我正在为Outlook 2013开发外接程序，我在PR_INTERNET_MESSAGE_ID方面苦苦挣扎，在归档传入邮件时可以轻松获得PR_INTERNET_MESSAGE_ID，但在发送邮件时却不返回任何内容. 任何帮助，将不胜感激！ 谢谢！ 这是我的代码

I'm developing add-in for Outlook 2013,I'm struggling with PR_INTERNET_MESSAGE_ID , I could easily get PR_INTERNET_MESSAGE_ID on archiving incoming mails, but it returns nothing on sending mail. Any help would be appreciated! Thank you! here is my code

 string PR_INTERNET_MESSAGE_ID = "http://schemas.microsoft.com/mapi/proptag/0x1035001F";
        Microsoft.Office.Interop.Outlook.PropertyAccessor pal = mailItem.PropertyAccessor;
        string Internet_Message_Id = pal.GetProperty(PR_INTERNET_MESSAGE_ID).ToString();

推荐答案

该属性仅在发送消息后发送. Exchange 2010/2013会为存储中创建的所有邮件设置该属性，但不一定会在缓存存储中的邮件上看到该属性. 您正在使用PST还是Exchange?

That property is only sent after the message is sent. Exchange 2010/2013 sets that property for all messages created in the store, but you will not necessarily see it on messages in the cached store. Are you using PST or Exchange?

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