no vserver option in New-NcSnapshotPolicy cmdlet?

I'm trying to automate creating snapshot policies with Powershell.  It looks like the New-NcSnapshotPolicy cmdlet doesn't have a vserver option.  So when I run it, all policies are created under the cluster vserver.  The cli command of snapshot policy create has the vserver option.  Any ideas why I can't do the same with Powershell?  I have toolkit 4.1 with CDOT of 8.3.1.  Thanks.

Dave