Many of you may had noticed the changes in vSphere 4 if you had previously implemented or managed any of the virtual environment running vmware infrastructure. VMware had converted every license file we previously own to a new license key which allow us to apply to the vSphere hosts we had in our environment. If you had sign up the SNS previously, you will be entitled for an upgrade and under the license portal of your official log in ID that previously register with the license you bought, you will notice the new licenses key provided once you log on. Generally, the way of managing the CPU licenses will no longer be the previos method as we did in ESX 3.5.