You might be aware that Microsoft does not support running virtualized instances of Exchange which virtual disk files are hosted on NFS datastores. Microsoft will provide best effort support if you are running into issues. Microsoft does however support running Exchange on SMB 3.0 file shares presented to Hyper-V servers.
See the storage requirements of Exchange 2013 here.
This is an interesting post about the lack of NFS support for Exchange by Microsoft.
Exchange will perfectly run when hosted on NFS. Many organizations use this configuration without issues and they probably are even not aware of this limitation. Here is a view by Tony Redmond NFS and Exchange: not a good combination:
Many storage vendors like Tintri, Maxta, NetApp and Nutanix use NFS.
You might change the support policy by voting ‘I agree‘ on this survey titled support storing exchange data on VMDKs on file shares(nfs/smb)
The replies by many experts in this survey are very interesting to read.