The vCenter Administrator role must be secured and assigned to specific users other than a Windows Administrator.

By default, vCenter Server grants full administrative rights to the local administrator's account, which can be accessed by domain administrators. Separation of duties dictates that full vCenter Administrative rights should be granted only to those administrators who are required to have it. This privilege should not be granted to any group whose membership is not strictly controlled. Therefore, administrative rights should be removed from the local Windows administrator account and instead be given to a special-purpose local vCenter Administrator account. This account should be used to create individual user accounts.