function Get-InactiveUsers {
    [CmdletBinding()]
    param (
        # Distinguished Names of search bases
        [Parameter(Mandatory=$true)]
        [String[]]
        $DistinguishedName,

        # Parameter help description
        [Parameter(Mandatory=$false)]
        [int]
        $LastLogonTreshold = 10

    )

    begin {
        Import-Module ActiveDirectory -ErrorVariable moduleError -ErrorAction SilentlyContinue
        if ($moduleError) {
            Write-Error $moduleError.Exception.Message -ErrorAction Stop
        }

        function Get-LastLogonTimeSpan {
            param (
                # User Object
                [Parameter(Mandatory,ValueFromPipeline)]
                [Microsoft.ActiveDirectory.Management.ADUser]
                $UserObject
            )
            $lastLogonDateTime = [datetime]::FromFileTime($UserObject.lastLogonTimeStamp)
            $daysSinceLastLogon = [math]::Round(((New-TimeSpan -Start $lastLogonDateTime -End (Get-Date)).TotalDays),0)
            return $daysSinceLastLogon
        }
    }

    process {
        $targetContainerArr = $DistinguishedName | ForEach-Object {Get-ADObject -Filter "DistinguishedName -eq '$_'"}
        [System.Collections.ArrayList]$returnObjArr = @()

        foreach ($targetContainerObj in $targetContainerArr) {
            $returnObjArr = (Get-ADUser -SearchBase $targetContainerObj.DistinguishedName -Filter "Enabled -eq 'true'" -Properties lastLogonTimeStamp,DisplayName) | Where-Object {(Get-LastLogonTimeSpan -UserObject $_) -gt $LastLogonTreshold} | Select-Object -Property Name,DisplayName,@{Name = "ContainerDN";Expression = {$targetContainerObj.DistinguishedName}},@{Name = "DaysSinceLastLogon";Expression = {Get-LastLogonTimeSpan -UserObject $_}}
        }
    }

    end {
        return $returnObjArr
    }
}