Use the vSphere Web Client Administration Tool to register or unregister vCenter Server systems with an instance of the vSphere Web Client.

The vSphere Web Client is a Web application that can reside either on the same system as vCenter Server or a separate system. Before you can connect to a vCenter Server System with the vSphere Web Client, you must register the vCenter Server system with the vSphere Web Client. Unregister a vCenter Server system when you no longer want users to be able to access that vCenter Server system using a particular instance of the vSphere Web Client.