31a12730_cation_vs__storage_replication__Feature
[SRM vSphere Replication] Five hundred. Deploy no more than 100 VMs per Replication server in SRM. VMware limits SRM's number of Replication servers to 10 One thousand. If vSphere Replication and array-based replication are used together, the limit remains 1,000 total VMs [Feature] 
VM limits
SRM replication choices: vSphere Replication vs. storage replication
Feature