Powershell iterate through server list with credentials - arrays

Question

I've been lurking around grabbing code answers from this site for years, but this is my first time actually asking a question. I don't actually get paid to code, rather I use scripts to make routine tasks easier.
I've been using a powershell script with the following code (that I pretty much gleaned from this site) to gather disk usage on client servers:
$dataColl = #()#Makes an array, or a collection to hold all the object of the same fields
foreach ($serverName in (get-content c:\reporting\Disk_useage\My_servers.txt))
{
$path = “\\$serverName\d$\folder1\TargetSubdir“
$dirSize = Get-ChildItem $path -recurse -force | select Length |Measure-Object -Sum length
$dirSize.sum = $dirSize.sum/1MB
$finalResult = “{0:N2} MB” -f $dirsize.sum
$dataObject = New-Object PSObject
Add-Member -inputObject $dataObject -memberType NoteProperty -name “ServerName” -value $serverName
Add-Member -inputObject $dataObject -memberType NoteProperty -name “Dir_Size” -value $finalResult
$dataColl += $dataObject
$dataObject
}
$dataColl | Export-Csv -noTypeInformation -path c:\reporting\Disk_useage\Svr_disk.csv
This has been working fine, but we now have a 2nd domain with client servers, so I need to add credentials for servers in the 2nd domain. I've been researching ways to pass credentials along, and got this bit of code (PW has been stored already in the .TXT file):
$username = "MyDomain\MyAccount"
$password = cat C:\reporting\securestring.txt | convertto-securestring
$cred = new-object -typename System.Management.Automation.PSCredential `
-argumentlist $username, $password
But I'm supposed to add these parameters somewhere to actually USE the credentials that have been set up:
-Authentication default -Credential $Cred
I've tried it in several different spots without success. FYI, the list in My_servers.txt has a bunch of servers I DON'T need credentials for (since they're on the current domain), and a bunch of servers where I DO need credentials (because they're on another domain). But the credentials I'm using for the script are for a service account that exists in both domains with the same ID/PW. Any help in sorting this out would be greatly appreciated.

Answer 1

Adil's suggestion in code would be:
$dataColl = #()#Makes an array, or a collection to hold all the object of the same fields
$username = "MyDomain\MyAccount"
$password = Get-Content C:\reporting\securestring.txt | convertto-securestring
$cred = New-Object -typename System.Management.Automation.PSCredential `
-argumentlist $username, $password
foreach ($serverName in (get-content c:\reporting\Disk_useage\My_servers.txt))
{
$dirSize = Invoke-Command -Credential $cred -ComputerName $serverName -ScriptBlock {
Get-ChildItem “d:\folder1\TargetSubdir“ -recurse -force | select Length | Measure-Object -Sum length
}
$dirSize.sum = $dirSize.sum/1MB
$finalResult = “{0:N2} MB” -f $dirsize.sum
$dataObject = New-Object PSObject
Add-Member -inputObject $dataObject -memberType NoteProperty -name “ServerName” -value $serverName
Add-Member -inputObject $dataObject -memberType NoteProperty -name “Dir_Size” -value $finalResult
$dataColl += $dataObject
$dataObject
}
$dataColl | Export-Csv -noTypeInformation -path c:\reporting\Disk_useage\Svr_disk.csv