Encapsulate the output of invoke command in a variable - PowerShell

Question

I have a script that installs Remote Desktop Services on remote machines (from the DC).

I'm now at the phase where I check if RDS installed on the connection broker (server) and connection host (server).

I want to use invoke-command since a remote powershell session seemed too complicated.

This is the code I have:

$res = Invoke-Command -ComputerName "testpc.eil.local" -ScriptBlock {
if((Get-WindowsFeature -Name "Remote-Desktop-Services").Installed -eq 1)
{
   #i need this output (true or false or a string)
}
else
{
     #i need this output (true or false or a string)
}
}


Write-Host $res

But my question is, how do I encapsulate the output of the scriptblock in the invoke-command in a variable that the DC can access? I'm trying to write away if RDS is succesfully installed or failed to a log-file

How do we encapsulate the output of the function and pass it to the machine who's running it?

Thanks

4c74356b41 · Accepted Answer · 2017-03-03 13:25:53Z

7

Generally for powershell to return something from a command\function, you want to produce any kind of output. So just "bla-bla" inside your code will return "bla-bla" to the caller. With that your case simplified:

$res = Invoke-Command -ComputerName "testpc.eil.local" -ScriptBlock {
    (Get-WindowsFeature -Name "Remote-Desktop-Services").Installed
}

do something with $res here

answered Mar 3, 2017 at 13:25

4c74356b41

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5 Comments

Kahn Kah Over a year ago

Thank you very much, it's weird that your method works but mine doesn't hehe!

4c74356b41 Over a year ago

just like I said, yours doesn't because you don't actually OUTPUT anything. You need to OUTPUT stuff to have something to capture

Kahn Kah Over a year ago

Okay but I was wondering why I couldn't just write Write-Host "Installed!" When I included it in my first script. (if test) but if I understand you correctly, it's because it's gets printed in the 'window' of the remote server and not the one from the DC?

4c74356b41 Over a year ago

yeah, don't use write-host, generally speaking, its messed up, use write-output

Kahn Kah Over a year ago

Thanks for the answer! I've understood it thanks to your explanation

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