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While server license prices remain constant, Exchange 2013 CALs purchased per-user cost 15% more than the corresponding Exchange 2010 CAL. Pictured are the different types of available Exchange-related licenses, pricing for the two latest versions, and license grants for Software Assurance (SA) customers. (SA is a subscription offering that provides rights to new product versions and other benefits for an annual fee.)

SA license grants are very straightforward. If SA coverage was active on an Exchange server license or CAL as of Oct. 2012, the customer is entitled to the corresponding Exchange 2013 license. The one exception is for the Exchange External Connector, which has been discontinued. License prices are listed in U.S. dollars.