it's not quite clear how you created the CIFS. in the first post you've said that you created a LUN, but later you said that you created a share directly on the filer.
so I assume you have created a share directly on a Netapp volume or qtree and this is on 7-Mode and not cDOT.
do you use OnCommand Unified Manager (DFM)/Protection Manager for the Snapmanager Exchange/SQL Snapvault updates?
if yes, then you can create a new dataset and a policy there and just add the CIFS volumes into the dataset. it then will
create the destination snapvault volume and the snapshots as of the policy.
if you don't have it, then the easiest way to create a Snapvault relationship for a volume is with System Manager.
https://fieldportal.netapp.com/Core/DownloadDoc.aspx?documentID=93297&contentID=126313
http://www.netapp.com/us/system/pdf-reader.aspx?m=tr-3487.pdf&cc=us