Richard flies solo to talk to Peter Schmidt about federation in Exchange 2010. While federation has been around for awhile in Exchange, the 2010 version gets away from connection Active Directory together and into a web services model that allows simple, limited visibility for other Exchange 2010 users into your calendar and contacts. If you've ever wanted to give a third party the ability to see when you're available without emailing you, you need federation! Check out Exchange 2010 Federation at TechNet.