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 make it unavailable for use in the vCloud Director environment.

For information about moving 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.


Disable the host and ensure that no virtual machines are running on the host.


  1. Click the Manage & Monitor tab and click Hosts in the left pane.
  2. Right-click the host name and select Prepare Host or Unprepare Host.
  3. If you are preparing a host, type a user name and password and click OK.


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