What is multiplexing, and how does it affect my Windows SBS 2003 R2 CALs?
“Multiplexing” is a term that sometimes used to describe the pooling of hardware or software so that the number of CALs needed is reduced. However, Microsoft licensing does not allow multiplexing and therefore does not reduce the number of CALs required. Any user or device that accesses the server, files, or data or content provided by the server, or that is made available through an automated process, requires a CAL. For example, you cannot create two generic user accounts on Terminal Server and let all employees log onto the server to gain access to information on the network. Each employee would still require a user CAL or device CAL, as appropriate. See the multiplexing whitepaper for more discussion on multiplexing.
