MsgConversationID for MAPI

Hi all,

I've been working on an email application using MAPI with VB. I've done some simulations with MsgConversationID property of MAPI and I'm not sure if I have a problem with the my exchange server or my code.

Here's the situation:
1. I composed an email.
2. Set the conversation Id.
3. Send the mail. (sent it to another exchange server)

I checked the mail received on the other end. ConverstionId property has no value on it.

Please help.


Thanks