email archiving solution for Outlook for Mac that will create searchable files without importing into an email programme and files can be imported by Outlook for windows

Hi there, As a Mac user, I'm the odd-one out in my team with everyone else using Windows as their operating system. We (are supposed to) archive our emails on a shared server and my colleagues need to be able to read my archives, e.g. in case I take up employment elsewhere and vice versa. Also, it would be very nice if the archives can be searched/indexed without having to import the archives in an email client. I use Outlook for Mac 2011 to handle my email, my colleagues all have Outlook for Windows.

Any advice, anyone? Thanks for sharing your thoughts. Koen