How many virtual CPUs can I use on a Fault Tolerant virtual machine ?

VMware vSphere® Fault Tolerance (FT) provides continuous availability for applications (with up to 4 virtual CPUs) in the event of server failures by creating a live shadow instance of a virtual machine that is always up-to-date with the primary virtual machine. In the event of a hardware outage, vSphere FT automatically triggers failover—ensuring zero downtime and preventing data loss.

After failover, vSphere FT automatically creates a new, secondary virtual machine to deliver continuous protection for the application.