Jose,
Thanks so much for your answer. I am sorry I steered you wrong. I am using Horizon 7 Version 7.2 so I can not use snap-ins. The commandlets you are using are no longer available.
No Send-VDILinkedCloneRefresh in this version. Just the View API - VMware API Explorer - VMware {code}
I would like to do what is on the View Horizon Admin Center Version 7 as
Catalog -> Desktop Pools -> Select one of the Pools....-> Look at Inventory of Machines -> Select one -> View Composer -> Refresh
So the previous Send-VDILinkedCloneRefresh is probably what I needed prior to this version.
I am using VMWare.Hv.Helper....but no equivalent commandlets there that I can tell.