There is one Microsoft exam that I find very interesting. That is the Microsoft Certified Master for Exchange program.
I found a nice video what tells what we actually do in the classroom during Microsoft Certified Master rotations? Well, here is a 30 minute summary of the Exchange 2010 header firewall from Brian Reid, one of our regular MCM instructors. Brian covers the header firewall and much more during his two and a half day delivery of instruction and labs on Exchange Transport.
You can find the video HERE