Can't create a remote admin using powershell [duplicate] - powershell

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How do I pass a local variable to a remote `Invoke-Command`? [duplicate]
(2 answers)
Closed 1 year ago.
Good afternoon.
I would like to ask for help.
I am trying to execute a script remotely.
When doing this, I get a NULL password error.
Please tell me how to be.
$pcName = #("pc1","pc2")
Invoke-Command -ComputerName $pcName {$UserPassword = ConvertTo-SecureString "test123456" -AsPlainText -Force}
Invoke-Command -ComputerName $pcName -ScriptBlock { New-LocalUser -Name "admintest" -Password $UserPassword -PasswordNeverExpires }
Invoke-Command -ComputerName $pcName -ScriptBlock { Add-LocalGroupMember -Group "Administrator" -Member "admintest" }
P.S I'm just learning.

Answer 1

Inside the scriptblock, variable $UserPassword is unknown. To be able to use the variable in the scriptblock, you need to either scope it with $using:UserPassword:
$UserPassword = ConvertTo-SecureString "test123456" -AsPlainText -Force
$pcName = "pc1", "pc2"
Invoke-Command -ComputerName $pcName -ScriptBlock {
try {
$newUser = New-LocalUser -Name "admintest" -Password $using:UserPassword -PasswordNeverExpires -ErrorAction Stop
Add-LocalGroupMember -Group "Administrators" -Member $newUser
}
catch {
Write-Warning "Could not create the new user:`r`n$($_.Exception.Message)"
}
}
OR
Have the scriptblock accept parameter(s) in a param(..) block and call like
$UserPassword = ConvertTo-SecureString "test123456" -AsPlainText -Force
$pcName = "pc1", "pc2"
Invoke-Command -ComputerName $pcName -ScriptBlock {
param ( [securestring] $Password )
try {
$newUser = New-LocalUser -Name "admintest" -Password $Password -PasswordNeverExpires -ErrorAction Stop
Add-LocalGroupMember -Group "Administrators" -Member $newUser
}
catch {
Write-Warning "Could not create the new user:`r`n$($_.Exception.Message)"
}
} -ArgumentList $UserPassword
P.S.
The group is called Administrators (plural)
I have used a try{..} catch{..} so you will receive an error message when things go wrong