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# Adapted from: https://itpro-tips.com/test-ad-authentication-with-powershell/
# The interesting bit about this one is that it doesn't seem to get logged by AD,
# so you won't end up with false positives from testing creds
function Test-ADAuthentication {
Param(
[Parameter(Mandatory)]
[string]$User,
[Parameter(Mandatory)]
$Password,
[Parameter(Mandatory = $false)]
$Server,
[Parameter(Mandatory = $false)]
[string]$Domain = $env:USERDOMAIN
)
Add-Type -AssemblyName System.DirectoryServices.AccountManagement
$contextType = [System.DirectoryServices.AccountManagement.ContextType]::Domain
$argumentList = New-Object -TypeName "System.Collections.ArrayList"
$null = $argumentList.Add($contextType)
$null = $argumentList.Add($Domain)
if($null -ne $Server){
$argumentList.Add($Server)
}
$principalContext = New-Object System.DirectoryServices.AccountManagement.PrincipalContext -ArgumentList $argumentList -ErrorAction SilentlyContinue
if ($null -eq $principalContext) {
Write-Warning "$Domain\$User - AD Authentication failed"
}
if ($principalContext.ValidateCredentials($User, $Password)) {
Write-Output "$Domain\$User - AD Authentication OK"
}
else {
Write-Warning "$Domain\$User - AD Authentication failed"
}
}
$csv = Import-Csv $args[0]
ForEach ($userpass in $csv) {
Test-ADAuthentication -User $userpass.user -Password $userpass.password
}
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