Decommissioning your Exchange 2010 servers in a Hybrid Deploymenthttp://blogs.technet.com/b/omers/archive/2012/12/07/decommissioning-your-exchange-2010-servers-in-a-hybrid-deployment.aspxMany organizations have chosen to configure a hybrid deployment with Exchange Online to take advantage of different features such as rich mailbox moves and cross-premises calendar free/busy sharing. This includes Exchange 2003, Exchange 2007 and Exchangeen-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)