Windows Server 2012/2012 R2 Client Access License - 1 User CAL
With the User CAL, you purchase a CAL for every user who accesses the server to use services such as file storage or printing, regardless of the number of devices they use for that access. Purchasing a User CAL might make more sense if your company’s employees need to have roaming access to the corporate network by using multiple devices, or from unknown devices, or if you simply have more devices than users in your organization.
MICROSOFT OPEN LICENSE BUSINESS Microsoft Open License is a software volume licensing program designed for corporate, government, charity, and academic customers who order as few as five licenses. After the initial order, customers can benefit from volume pricing for all licenses for the remainder of the term of their Open License authorization number. Open License Business offers savings on estimated retail prices by placing an initial order for five or more licenses or one server processor license. With Open License Business, customers can combine any set of Microsoft products to qualify for the five-license minimum