One of the things that is asked for quite frequently, at least it has been in the past, is that end-users want to be able to do Enterprise Vault operations from Search Folders. I use Search Folders with Outlook 2010 quite frequently for things like “Mails from the Team”, and “Escalations Requested” that sort of thing. It used to frustrate me that I couldn’t manually archive an item, or restore an archived item.
With the Enterprise Vault Outlook Addin 9.0.1 or higher you *can* do these operations against Outlook 2010.
Unfortunately you can’t with Outlook 2007 or lower.