Yes you can take a snapshot of the replicated data from the snapshot tab using 'Take Snapshot Now' option, please be sure that you are on the latest code 2.3.1.20364
I'm dealing with a situation that involves a rather large CIFS file system on VNXe and the customer would prefer to "snap and replicate" since it is becoming too difficult to backup with traditional tools.    What I'm looking for is a confirmation that the VNXe can create a snapshot of the replicated data on the secondary VNXe.    We need some level of comfort that if corruption is replicated to the second side, there would be snapshots of the data there to rollback from.    I seem to recall from my old Celerra admin days that the replica filesystem is in a "raw" format and not online until you trigger a failover, and so I question whether or not it is possible to create a snapshot of the replica data in that state.   Of course, things could be completely different now anyway with how it is done on VNXe.   Thanks,Dan
VNXe Snapshots on replica side