I think the best way is :
- Migrate your windows vcenter to VCSA embeded 6.5
- Deploye a PSC server only
- Use command line cmsso-util on VCSA 6.5 to choose an external PSC server (Juste deployed)
Be careful, if you want two PSC server you must need a load balancer front in it.
Surely the load balancer is optional?
If one of my vCenter servers loses it's respective PSC I can surely repoint it at the other PSC?
...... this blog article explains quite well that the LB is optional, and actually the LBs seem like an over-architected complexity that really isn't that necessary.