Exchange 2010 Hybrid Deployments
With Exchange 2010 SP2 you received the new Hybrid Configuration Wizard included as an enhancement of Exchange Management Console (EMC) and with additional cmdlets on Exchange Management Shell (EMS).
The new wizard will guide, verify and configure for you many former manual steps.
Read the articles on TechNet about Hybrid Deployments here
http://technet.microsoft.com/en-us/library/gg577584.aspx