Hey,  You cannot configure two replicas for the source VNXe, and cannot write the replica when the source is normal. Please refer to below picture:  Before the failover, the source is read-wirte and the replica is read-only; but once the data has been failed over to the destination, the replica becomes read-write and the source becomes read-only. Then after the failback, the source change back to read-write and replica change back to read-only.   Hope this help you to understand VNXe replication.[IMAGE]  [IMAGE]
Is there a way to have 2 remote VNXe systems replicate a file share, and keep writable copies at both locations?  In a single replication session, can I configure: Changes at SITE-A are replicated to SITE-B  changes at SITE-B are replicated to SITE-A
VNXe 2-way Remote Replicaiton