Powershell: Get-WmiObject cannot run asJob in loop

Question

I want to sometimes check some info from our servers in domains. In this example, I am trying to remotely get windows versions (just one server, currently without loop):

$cr=Get-Credential "domain\adm_user"
$computer="serverA"
Invoke-Command { Get-WmiObject -Class Win32_OperatingSystem -Namespace root/cimv2 -Computer $computer -Credential $cr | Format-List -Property Name, OSArchitecture, SerialNumber} -AsJob -ComputerName .
Get-Job | Wait-Job
Get-Job | Receive-Job

Output:

Cannot validate argument on parameter 'ComputerName'. The argument is null or empty. Supply an argument that is not null or empty and then try the command again.

Seems, that scriptblock {} cannot see variable $computer. When I replace variable -computer $computer to name of server, it is working.

The correct parameter is -ComputerName - you are using -Computer? — Jelphy
– Jelphy, Commented May 31, 2017 at 10:28
Computer and ComputerName is alias. I tried long name and output (error) is same. — Jerry1
– Jerry1, Commented May 31, 2017 at 10:48

Jelphy · Accepted Answer · 2017-05-31 10:59:48Z

1

For variable expansion inside Invoke-Command use a param block and specify arguments:

$computer = 'localhost'
Invoke-Command {param($computer) Get-WmiObject Win32_OperatingSystem -Computername $computer } -ArgumentList $computer

Working on PS v5.

answered May 31, 2017 at 10:59

Jelphy

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