. Microsoft Exchange Server Enterprise Edition - Licence and; Software Assurance - 1 Server - Additional Product Annual Fee - PCExchange Server allows you to choose the protocols for clients that are best for them rather than locking them into a single protocol environment. If you want to build collaborative applications that take advantage of the messaging platform Exchange Server provides tools that help you take advantage of existing knowledge. License Type Licence and; software assurance License Qty 1 server Licensing Program MOLP Open Value Subscription Language(s) All Languages Platform Windows. .