Microsoft Exchange Server 2013 enables you to maintain control, increase user productivity, and keep your organization safe. You can move to the cloud on your terms with flexible migration options. Your users can do more on any device, helping them manage increasing volumes of email and work together more effectively as teams. You can also protect your business communications and sensitive information, while meeting internal and regulatory compliance requirements. With Exchange Server 2013, you can work smarter, anywhere.
Link – http://technet.microsoft.com/en-us/evalcenter/hh973395.aspx?wt.mc_id=TEC_116_1_33