VNX file system migration

Want to make sure I understand the CIFS share migration options before I position with a customer.   Obviously, there is the EMCOPY or ROBOCOPY option.    I saw the old Celerra CDMS functionality is still there in the VNX for File.   Is this supported to migrate from a CIFS server that is currently on a Centera CUA node?   I checked the NAS Support Matrix and didn't find much for CDMS or migration.

Thanks!

Dan