You can view the licensing state of the vSphere environment from a central place by using the license management functionality in the
vSphere Web Client. You can view the licenses that are available in vSphere, current license assignments and usage, available license capacity, licensed features in use, and so on.
View Licensing Information About the vSphere Environment You can view the available licenses in vSphere along with their expiration dates, available capacity, and usage. You can also view the available products and assets.
View Available Licenses and Features About a Product You can view information about a product, such as the available licenses, features, and license capacity in the vSphere Web Client.
View the Features that an Asset Uses You can view the features that an asset uses before you assign it a license. For example, if an ESXi host is in evaluation mode, you can view which features the hosts uses and then assign an appropriate license to it.
View the License Key of the License In vSphere, a license holds a license key for a product. You can view the associated license key for every license.
View the Licensed Features for an Asset Before you start to use a feature on an asset, you can check whether the asset is licensed to use this feature. For example, to use vSphere HA, you should check whether all hosts in a vSphere HA cluster are licensed for this feature.