According to the Object Browser ConversationIndex is read-only for the
Outlook object model.
You can change that property using CDO 1.21 or Redemption or Extended MAPI
but not with the Outlook object model.

Signature
Ken Slovak
[MVP - Outlook]
http://www.slovaktech.com
Author: Absolute Beginner's Guide to Microsoft Office Outlook 2003
Reminder Manager, Extended Reminders, Attachment Options
http://www.slovaktech.com/products.htm
> Is there a way to change the ConversationIndex of a post item to have it
> link to another parent?
>
> Jack
Jack - 27 Apr 2006 16:52 GMT
Is there anything that one should be aware of when changing the
ConversationTopic (not Index) via CDO (actually I am using Redemption's
RDO)? Do I need to change the ConversationIndex to correspond to the new
Topic???
Jack
> According to the Object Browser ConversationIndex is read-only for the
> Outlook object model.
[quoted text clipped - 6 lines]
>>
>> Jack
Ken Slovak - [MVP - Outlook] - 27 Apr 2006 21:16 GMT
ConversationIndex starts with a GUID (I forget offhand how it's constructed)
and then for each item in the thread it adds a time struct which takes up 20
bytes as I recall. That's how items are threaded. You can do whatever you
want with that value but things might not thread correctly if you don't
follow the rules.

Signature
Ken Slovak
[MVP - Outlook]
http://www.slovaktech.com
Author: Absolute Beginner's Guide to Microsoft Office Outlook 2003
Reminder Manager, Extended Reminders, Attachment Options
http://www.slovaktech.com/products.htm
> Is there anything that one should be aware of when changing the
> ConversationTopic (not Index) via CDO (actually I am using Redemption's
> RDO)? Do I need to change the ConversationIndex to correspond to the new
> Topic???
>
> Jack