1 For customers that do not need virtualization, Windows Server 2008 Standard, Enterprise, and Datacenter editions are available without Windows Server Hyper-V Technology.
2 Limited to creating Certificate Authorities—no other ADCS features (NDES, Online Responder Service). See ADCS role documentation on TechNet for more information.
3 Limited to one standalone DFS root.
4 Limited to 250 RRAS connections, 50 IAS connections, and 2 IAS Server Groups.
5 Limited to 250 Terminal Services Gateway connections.
6 Limited to 50RRAS, 10 IAS connections and X IAS Server Groups
7 Limited to 50 Terminal Services Gateway connections. (Quelle: Microsoft)