Exchange Server 2013 Standard – Server License & SA through the Microsoft Open Business License Program
IMPORTANT NOTE: New orders must also purchase a minimum of 5 CALs
Exchange Server 2013 Standard brings a new rich set of technologies features and services to the Exchange Server product line. Its goal is to support people and organizations as their work habits evolve from a communication focus to a collaboration focus. At the same time Exchange Server 2013 helps lower the total cost of ownership whether you deploy Exchange 2013 on-premises or provision your mailboxes in the cloud. The Standard Edition is limited to 5 databases per server.
Microsoft Software Assurance is a maintenance offer that helps your organization get the most from Microsoft software through a broad range of benefits. From deployment planning and staff training to product support and software upgrades Software Assurance benefits help you increase worker productivity accelerate organizational performance and realize a return on your software investment faster. Software Assurance coverage is available for two years or until the end of the term of Open License authorization number whichever comes first.
Microsoft Open Licensing allows the ability to purchase under the same authorization number for two years. Open Business offers volume pricing with only a five minimum license requirement.