Due to the changes in the new vCenter Server 6.0 architecture, the SSO has now been incorporated in the new VMware Platform Services Controller “role”. But the concepts of a global SSO accounts still exist and remain important to manage the infrastructure (and more important during installation and upgrade). If you forget the SSO admin password you can have some trouble. I’ve already wrote on how reset the VMware SSO password in the vSphere 5.1 and 5.5 versions and the procedure remain almost the same also in the 6.0 version.