I have an Exchange 2010 server and an external spam filter which tags emails with a header to mark it as spam. I want to create a rule (or some other method) at the Exchange server that filters all tagged email into a specified subfolder. I can create a Transport Rule under Hub Transport which can create a header item or a number of other actions, but not actually move it to a subfolder (as far as I can see).
I want to do this once, at the server rather than having to touch each existing user 's system (mixed Outlook 2003 and 2007) to create a folder and matching rule. Also, I want it to work for new users without manual configuration, which is why I want to do it at the Exchange level.
I know I can set the SCL and use the Junk E-mail group policy but when I tried that I realized that Outlook was doing it's own filtering as well. I don't want that - I only want items moved if they have the specific header tag (or some other marker to be specified - I'm open to ideas).