To explore the complete set of features available for an ESXi host, you can set it to evaluation mode.


In the vSphere Web Client, navigate to the host in the inventory.


On the Manage tab, select Settings.


Under System, click Licensing.


Click Assign License Key.


Select Evaluation mode.


Click OK to save your changes.

The host is in evaluation mode and you can explore the entire set of features that are relevant to a vSphere Enterprise Plus license. If you have already used the host in evaluation mode, the time that remains in the evaluation period is decreased by the time already used.


After the evaluation period of the host expires, you receive a warning message, and the host disconnects from vCenter Server. All powered-on virtual machines continue to work, but you cannot power on any new virtual machines. You cannot change the current configuration of the features that are already in use. You cannot use the features that remained unused while the host was in evaluation mode.