Ok going though this process has enlightened me to what I think may be issue.
My parent is not domain joined but the pool is however in order to provision applications i cannot find my provisioning workstation unless I join it to the domain... but in your reponce you said IF its domain joined... how do I provision on a non domain joined workstation?
as I'm thinking they need to be the same.
if this is not possible I may have to rethink my Parent and join it to the domain my windows 7 one has always been domain joined but I was led to believe with the Creating an Optimized windows image for VMware horzon guide I was using for windows 10 that I wasn't supposed to do that.