$SourceGroup = "Terminal Service Users"
$TargetGroup = "RDG Users"

$Sgroupmem = Get-ADGroupmember -Identity $SourceGroup
Add-ADGroupmember -Identity $TargetGroup -Member $Sgroupmem

Script to produce a nice HTML report of the Hyper-V resources…

.\Get-HyperVReport.ps1 -VMHost Host1,Host2,Host3

https://gallery.technet.microsoft.com/scriptcenter/Hyper-V-Reporting-Script-4adaf5d0