问题
For a custom email/attachment encryption solution, during ItemAdd event for sent items folder, I am creating a copy of a mail with different body and attachments but the subject is the same. That means when you afterward look into sent items you will see two emails with different content but the same subject but only one has been sent really.
Problem:
When you get a reply to the one which has been really sent, in inbox conversation view you only see the one which has been really sent. But I want to show the other one as well in the conversation view as it contains the unencrypted content.
Question:
What else do I need to set for the copied email in sent items so that it will be shown as part of the conversation of the originally sent email in inbox conversation view? Also, PR_CONVERSATION_TOPIC_W is the same for both items in sent items. Any other property I need to setup for the copied email?
Thank you very much in advance!
回答1:
You also need to copy the PR_CONVERSATION_INDEX binary property - take a look at an existing message with OutlookSpy (click IMessage button).
来源：https://stackoverflow.com/questions/58996620/what-are-the-item-criterias-for-the-outlook-inbox-conversation-view-of-a-convers