I just came across an unofficial vCloud Suite 5.1 upgrade guide by Jad El-Zem which covers off the steps involved and a few gotchas to watch out for.
CloudXC
By Josh Odgers – VMware Certified Design Expert (VCDX) #90
I just came across an unofficial vCloud Suite 5.1 upgrade guide by Jad El-Zem which covers off the steps involved and a few gotchas to watch out for.