Powershell - Not able to pass remote session variable back to local system - powershell

Question

I am trying to figure out what I am doing wrong here. Very new to powershell so be gentle... Trying to run a PSSession on remote system (reading in from list of systems). Then trying to return the value for missing patches to my local system to then export to CSV. I am looking solely for a number to be returned. The value gets displayed in the Powershell window when inside the Invoke-command but then at the bottom of the script nothing is shown. Can anyone offer some advice how I can pass that value back to my system to then be able to export to a csv? Any advice would be greatly appreciated.
$array1 = Get-Content "C:\Users\******\Desktop\Server_List.txt"
$ReportResults = New-Object System.Collections.Generic.List[System.Object]
$Searchresult = #()
#parse thru each machine name in
foreach ($MachineName in $array1)
{
Write-host $MachineName
$session = New-PSSession -ComputerName $MachineName
Invoke-Command -Session $session {
Param($ReportResults)
#Get All Assigned updates in $SearchResult
$UpdateSession = New-Object -ComObject Microsoft.Update.Session
$UpdateSearcher = $UpdateSession.CreateUpdateSearcher()
$SearchResult = $UpdateSearcher.Search("IsAssigned=1 and IsHidden=0 and
IsInstalled=0")
Write-Host "total=$($SearchResult.updates.count)"
$ReportResults.add($SearchResult)
} -ArgumentList $ReportResults
Remove-PSSession $session
}
$ReportResults # | export-csv C:\Users\******\Desktop\Compprogs\Test.csv -
Notypeinformation

Answer 1

You've to "mark" parameter as ref. See this link for further info.
Alternativelly you can return your desired value via Write-Output. Example:
$returnValue = Invoke-Command -ScriptBlock {
Write-Output "Hello World"
}
# $returnValue should include "Hello World"
Write-Host $returnValue
Be aware that when you use Write-Ouput multiple times at Invoke-Command $returnValue will include ALL values wrote to the output steram via Write-Ouput.
Hope that helps