If remediation fails, you can roll back virtual machines and appliances to their previous state.
You can configure Update Manager to take snapshots of virtual machines and appliances and to keep them indefinitely or for a specific period of time. After the remediation is completed, you can validate the remediation and delete the snapshots if you do not need them.
When you upgrade VMware Tools on power cycle in selected virtual machines, Update Manager does not take a snapshot of the virtual machines before remediation and you cannot roll back. Update Manager does not take snapshots of fault tolerant virtual machines.