This software is only available with an active cloud service subscription.
With the Per User CAL model, a separate CAL is required for each unique user who accesses a server. If a user uses multiple computers, the user can access the server from each computer using only a single CAL. However, if a different user logs on to one of the computers, that user will need a separate Per User CAL to access the server.
A typical example of the Per User CAL might be for a company that has two Exchange Servers used by 200 employees on 220 computers. This would require two server licenses (to install the product on the servers) and 200 Per User CALs. Because a CAL is assigned to each user, the number of computers accessing the servers is unimportant.