Complex sentence: A DFS root can only exist on a server version of Windows, from Windows NT 4.0 and up, or on a computer running Samba, the Enterprise and Datacenter Editions of Windows can host multiple DFS roots on the same server.
Split into simpler sentences: A DFS root can only exist on a server version of Windows, from Windows NT 4.0 and up, or on a computer running Samba. The Enterprise and Datacenter Editions of Windows Server can host multiple DFS roots on the same server.