Microsoft is sponsoring research at the University of Michigan's Center for Information Technology Integration (CITI) to develop an open source NFS client for Windows. CITI developed the open source Linux-based reference implementation of NFSv4 that is already included in all Linux distributions. Details were shared by Bob Muglia, president of the Server and Tools Business (STB) at Microsoft.
Check the announcement on Microsoft's Port25 site at
You can also check the University of Michigan's press release at