Outlook 2007, SBS 2008 - Search Folder Issue

I have been using Search folders for a few years now to help people separate email.  Typically, I'll have Exchange set up with more than 1 SMTP address for a user and then hook them up with Search Folders so they can separate their mail.  For example, there might be 1 person that manages the info@company.org email address.  My newest installation is now using SBS 2008 and they want their board of directors to all have email addresses.  They don't want to forward these emails directly to the board members, they want them going to the admin assistant.  So I have additional SMTP addresses set up for her.

Now I used to make a custom Search folder to look for address@company.org in the "To" field.  (I use custom so it lets me type in the address instead of having to pick it from my contacts).  This works great with Exchange 2003 (or SBS 2003) on the back end.  With Exchange 2007 (SBS 2008) on the back end, its not giving me any results.  Even though when I check the message headers, the To field indeed says "address@company.org" - the To field in Outlook displays the user's name instead.  So Outlook seems to be using this instead of the information in the header of the email.

So anyhow, can anyone suggest a way to separate this email out so its easy for the user to manage?  Thanks.

I ended up using message rules to move messages into different folders, but this is a bandaid to the real problem.  This doesn't resolve the possibiltiy of an email being sent to more than 1 email address for the user.  For example, 1 email sent to three email addresses of the user will only be delivered once, and will bounce around to end up in 1 email box only - unless I use the copy command but I still might get caught up in rule hierarchy.  Any help in forcing Outlook 2007 to look in the Header of an email instead of just the translated "to" field in a Search Folder would be great.