When you add an ESX/ESXi host to a vSphere cluster that vCloud Director uses, you must prepare the host before a provider virtual datacenter can use its resources. You can unprepare a host to remove it from the vCloud Director environment.

For information about moving running virtual machines from one host to another, see Move Virtual Machines from one ESX/ESXi Host to Another.

You cannot prepare a host that is in lockdown mode. After you prepare a host, you can enable lockdown mode.


Before you can unprepare a host, you must disable it and ensure that no virtual machines are running on the host.


  1. Click the Manage & Monitor tab and click Provider VDCs in the left pane.
  2. Right-click the provider virtual datacenter name and select Open.
  3. Click the Hosts tab.
  4. Right-click the host name and select Prepare Host or Unprepare Host.


vCloud Director prepares or unprepares the host for all provider virtual datacenters that use its resources.