I don't think the answer accepted to the the following question was the best answer. However, the question has been closed. Not sure why it was closed\locked out with the answer given. I will post what I believe is a much better answer to this question.
I have a customer who is wanting to know how to get Outlook search to include the message header. Basically he wants to be able to search for a domain name for example and find emails to/from people in that domain. As the display name of the senders/receivers is shown and not the full email address this approach is hit and miss depending on the actual email contents. Can this be resolved as Outlook is in it's current state (this customer is using Office 2007 and Exchange 2007) or would an upgrade to 2010 resolve the issue? (Maybe an option in the search or something like that?)

