A client has two sections in their company, one where User CALS make sense but a section with 5 machines and many more users doing separate shifts on those machines. In Windows Server 2012 R2 can you have some User CALS for the first group, and then 5 device CALS for the other section, or do they have to choose the best up front? I primarily use Essentials where you don't have to worry about CALS at all.
Also, if in don't is there a more common choice, i.e. 95% of the time it's User...