Restore with Direct Connection to ESXi Host
Sometimes you must restore a virtual machine directly to an ESXi host, for example in disaster recovery when vCenter Server runs on ESXi as a virtual machine. A new vSphere 5 feature tries to prevent this if the ESXi host is managed by vCenter. To circumvent this and restore the virtual machine, you must first disassociate the host from vCenter. In earlier releases, vCenter management had less state but was revocable only from vCenter.