So you have a new / different vCenter you want to move your VDI machines to. For the power management part, you will need to have the other hypervisor connection configured. You can run the script below to change the hypervisor connection on your VDI machines. You will want to make sure you have the VMs powered down before beginning. The first steps are just information gathering. This is part of migrating machines to new hardware. I will be adding the other pieces at a later date.

First you will need to get your hypervisor names and Uids with this command: Get-BrokerHypervisorConnection | Select-Object Name, HypHypervisorType, Uid.

Then you can get a list of machines with the hypervisor connection you want to change from. This was just getting the first machine that had the hypervisor I wanted to change from. Machine was already moved to a new Uid but it would be 2 in this case. Get-BrokerMachine -MaxRecordCount 100000 | Where-Object SessionSupport -eq “SingleSession” | Where-Object HypervisorConnectionUid -eq “3” | Select-Object -first 1 | Select-Object HostedMachineName, HypervisorConnectionName, HypervisorConnectionUid

<#  Script to change Hypervisor connection and power systems back up. This was done with PowerShell ISE 5.1, default profile configured on CitrixCloud SDK, and ESXi 7.0 with connection
    to vCenter. This was built from Ben McGirt and slightly modified to get the machine names with a specific configured HypervisorConnection via Get-BrokerMachine command.
    As it is best to change these settings and power the VM on, you will need to have the VMs powered down before beginning. The Uid in the example is "2" to get the machines using a different
    HypvisorConnectionUid that you wish to change from and setting in this example to HypervisorConnectionUid "3."
#>

Get-XDAuthentication -ProfileName "default"

$getVDIMachines = Get-BrokerMachine -MaxRecordCount 100000 | Where-Object SessionSupport -eq "SingleSession" | Where-Object HypervisorConnectionUid -eq "2" | Select-Object HostedMachineName, HypervisorConnectionName, HypervisorConnectionUid

$citrixVMs = $getVDIMachines.HostedMachineName
 
Function PowerOnVM ([string] $Name) #, [string] $Hostname)
#From https://thecloudxpert.net/2016/04/25/howto-power-on-a-vmware-virtual-machine-with-powercli-powercli-101/
{
    $VM = Get-VM -Name $Name
    Switch ($VM.PowerState)
    {
        PoweredOn { Write-Host "$VM already Powered On.";break}
        PoweredOff { Write-Host "Powering on $VM"; Start-VM -VM $VM;break}
        Suspended { Write-Host "$VM suspended.";break}
        Default {break}
    }
}
 

ForEach ($VM in $CitrixVMs){

    Set-BrokerMachine -MachineName ("*\" + $VM) -HypervisorConnectionUid 3
    Start-Sleep -Seconds 2
    PowerOnVM $VM
    
    }