It is backing up customers' servers. On the machine that they wish to protect, they deploy an agent on it.
It is essential for all businesses to back up their IT systems. In our view, it has to be automatic, offsite, and require no user intervention at the client level. The SolarWinds product provides all of those things.
The solution supports full-system, bare-metal, file, and folder. One of the reasons that we like the system is that it maintains up-to-date standby virtual machines, which can be booted at short notice if the customer's primary device fails. So, the predominant recovery methodology that we have is backing up to hypervisor as a VM. We have used the bare-metal recovery in the past and that has its use, but all the ones that we have put onto our customers in a commercial sense are all recovering to hypervisors.
Without cloud storage, we wouldn't do it. If it didn't have offsite storage, we would not be using it as a backup solution.