We are planning vSphere farm upgrade from 6.0U2 to 6.7U2 or higher. currently,there are 3 vcneter instances (3sites) with all external PSC joined one single SSO domain that allows enhanced linked mode.
what will be the upgrade sequence of different sites (PSC,vCenter,SRM).our ultimate goal is to get rid of external PSC and upgrade to embedded PSC with vCenter for all sites without loosing linked mode feature