We use exclusively NFSv4 for end-user access.   It is possible in the Web UI to disable NFSv3 entirely.  However we use InsightIQ and it uses NFS to access the File System Analytics.

Has anyone experience of disabling NFSv3, and knows if InsightIQ can still connect to the FSA data?   I have not seen a way to restrict NFS version per export (which would otherwise be very useful).