1. Stop the Platform Services Controller that you no longer need.
  2. Manually repoint all vCenter Servers and all vCenter Server instances registered with the Platform Services Controller to another Platform Services Controller within the domain.
  3. Log in as root to the appliance shell of one of the Platform Services Controller appliances within the domain.
  4. To enable the Bash shell, run the shell.set --enabled true command.
    Run the shell command to start the Bash shell and log in.

    Run the cmsso-util unregister command to unregister the stopped Platform Services Controller

    cmsso-util unregister --node-pnid Platform_Services_Controller_System_Name --username administrator@your_domain_name --passwd vCenter_Single_Sign_On_password

    Here, Platform_Services_Controller_System_Name is the FQDN or IP address of the Platform Services Controller that you want to decommission. You must run this command only on one of the Platform Services Controller replication partners, as the synchronization removes the entries from all other Platform Services Controller replication partners.
  5. Delete the Platform Services Controller appliance that you no longer need from the vSphere inventory.