The only time you need to add an ESX Server host to VMM is when you add a new ESX Server host to VMware VirtualCenter after adding the VirtualCenter server to VMM. For a procedure, see How to Add an ESX Server Host to VMM in a Managed VMware Environment (http://go.microsoft.com/fwlink/?LinkId=145527).
You do not need to add ESX Server hosts that VirtualCenter was managing when you added the VirtualCenter server to VMM. When you add a VirtualCenter server to VMM, VMM adds existing hosts automatically with an initial status of OK (Limited) until you provide the security information to enable file transfer operations on each host. For more information, see Supported Virtual Machine Actions for ESX Server Hosts. For a procedure for configuring the security information for an ESX Server host, see How to Configure Security Information for a Managed ESX Server Host (http://go.microsoft.com/fwlink/?LinkId=145528).
For detailed information about security requirements and end-to-end procedures for configuring the VMware VirtualCenter server and ESX Server hosts for management by VMM, see Configuring Security for a Managed VMware Environment (http://go.microsoft.com/fwlink/?LinkId=145051).
For the most up-to-date Help information, go to the Virtual Machine Manager 2008 Help Online. To find additional Virtual Machine Manager 2008 documentation, go to the Virtual Machine Manager 2008 TechCenter Library.