Hi there, Have you tried to configure an admin user just for the cluster the vRPAs are deployed on ?  Moreover, we've fixed this discovery issue in RP4VMs 5.1.1 which went GA recently. feel free to grab it, try to deploy again and contact me directly if you're running into this or other issues.  Regards, Idan Kentor RecoverPoint Corporate Systems Engineering idan.kentor[NAME].com [NAME]
I am deploying a POC rp4vm environment, the esxi is 5.5 U2 and, rp4vm is 5.1 c149, I can pass the VCENTER connection with no error, but when I need to choose vrpas, it show me "failed to discover available vrpas, I find a KB, I tried to create a user and assign only cluster1 to the user, cluster1 is the cluster vrpa deployed in, and use this user to connect vrpa with vcenter, but the deployer show me that have noy enough rights to do the connection. the error messages are both too simple, I think I can not find any log to troubleshooting,  anyone has experience? what can I do? 
how to handle "Failed to discover available vRPAS"