In this post we will be working on using a custom signed certificates (CA Signed) on vSphere Replication Appliance.
Unlike vCenter Server, there is no automated way of replacing the default certificates on VR appliance and all it needs a bit of manual effort. VMware has outlined the steps in the official KB-2080395 to do so.
Before performing these steps, make sure you have already replaced the default certificates on your vCenter Server.
vSphere Replication appliance ships with openssl and you can use this to generate the certificate signing requests for the vSphere Replication appliance