A company hired me recently. They've been using Zimbra. Now, upper management has dictated that the entire company be on exchange. I tried to talk them out of it since I'm an open source guy, but no luck. I guess I'm too new.

So, my question is what is the best way to migrate from Zimbra to MS Exchange 2007? Can it be done automatically? Is there a simple tool or script that I could use? Is it even possible?

I'm not sure why they want to switch, and I'm hoping that I can convince them in the future to use Zimbra.

Thanks for any help.