Calling all Outlook / VBA experts! I've been pounding my head against my desk for quite some time trying to figure out how to do this.
The issue is, some users have an Outlook add-in that adds certain keywords to the subject of the message when they reply. There are only a handful of these. Naturally, because the subject is now different, these will show up as a separate conversation in Outlook 2007.
Allow me to illustrate with an example. I send John, Bob, and Mary an e-mail with the subject: "Hey there!". John replies with the subject "RE: Hey there!". Outlook groups this in the same conversation. Mary decides to forward his reply to me, again, and the subject now reads "FW: Hey there!". This is also grouped in the same conversation. However, when Bob replies, the subject is now "RE: Hey there! (PRIVATE)", and this is grouped into a separate conversation. Any further replies to Bob's message will now be grouped into the second conversation.
What I want to do is filter keywords such as (PRIVATE) and have them ignored much like RE: and FW: for the purposes of conversation grouping. That way, regardless of the presence of these keywords, Outlook will group everything into the same conversation.
I really hope this is possible! The first person to figure this out will become my personal hero for the remainder of the year =)