Once the VMs are auto-discovered after adding the VCenters into VROPS.
Then, what are the polices we need to deploy to start collecting data and metrics for all the VMs in the environment ?
I'm not looking for application monitoring. I'm just looking to monitor the VMs through out-of-box without installing agents.
When you add a vcenter to vrops it will auto collect metrics based on the default policy. I would recommend creating a new policy for your company and making it default. You can make sub policies off that if you want to not collect certain metrics or disable/enable different alerts.
You would apply the different policies to different sets of objects using custom groups