You can deploy the vCenter Server Appliance on an ESXi host 5.0 or later, or on a vCenter Server instance 5.0 or later. Your system must also meet specific software and hardware requirements.

When you use Fully Qualified Domain Names, make sure that the machine you use for deploying the vCenter Server Appliance and the ESXi host are on the same DNS server.

Before you deploy the vCenter Server Appliance, synchronize the clocks of all virtual machines on the vSphere network. Unsynchronized clocks might result in authentication problems and can cause the installation to fail or prevent the vCenter Server services from starting. See Synchronizing Clocks on the vSphere Network.