How to run this script against another domain - powershell

Question

I have the script below to give me the distinguished name for groups in a spreadsheet I have. The issue is, the groups are located in another domain. How do I point my script to that domain? Issue is I know I have to be logged in to that domain to run it but I cant.
$Groups = Get-Content -Path C:\Scripts\DistinguishedName.csv
ForEach ($Group in $Groups) {
Get-ADGroup -Identity $Group | Select-Object distinguishedName
}

Answer 1

The cmdlets in the Active Directory module support passing in the value of the domain controller you are wanting to query. By default when you call Get-ADGroup (or any of the other) it will validate what domain it should query by checking the domain of your current machine.
The other option is to provide the -Server (doc) with the value of the Active Directory Domain Services you want to execute your query against.
You can also provide the -Credential parameter with a PSCredential object that contains your login for that other domain. This is required if the current login of your PowerShell session is not authorized to authenticate against that other domain.
So your example script would look something like this:
$AdDomain = "whatever.company.local"
$adCred = Get-Credential
$Groups = Get-Content -Path C:\Scripts\DistinguishedName.csv
ForEach ($Group in $Groups) {
Get-ADGroup -Identity $Group -Server $AdDomain -Credential $adCred | Select-Object distinguishedName
}