# FindUser2.ps1
# PowerShell script to query AD for user with specified Common Name.
#
# ----------------------------------------------------------------------
# Copyright (c) 2011 Richard L. Mueller
# Hilltop Lab web site - http://www.rlmueller.net
# Version 1.0 - January 9, 2011
#
# This program demonstrates how to use the 
# System.DirectoryServices.DirectorySearcher class to query Active
# Directory. This example finds the Distinguished Name of all objects
# (there could be more than one) that have a specified Common Name.
#
# You have a royalty-free right to use, modify, reproduce, and
# distribute this script file in any way you find useful, provided that
# you agree that the copyright owner above has no warranty, obligations,
# or liability for such use.

# Specify Common Name of user.
$strName = "James K. Smith"

$strDomain = New-Object System.DirectoryServices.DirectoryEntry
$objSearcher = New-Object System.DirectoryServices.DirectorySearcher
$objSearcher.SearchRoot = $strDomain
$objSearcher.PageSize = 100
$objSearcher.SearchScope = "subtree"

# Specify attribute values to retrieve.
$arrAttributes = @("distinguishedName")
ForEach($strAttribute In $arrAttributes)
{
    $objSearcher.PropertiesToLoad.Add($strAttribute) > $Null
}

# Filter on object with specified Common Name.
$objSearcher.Filter = "(cn=$strName)"

$colResults = $objSearcher.FindAll()
ForEach ($strResult In $colResults)
{
    $strDN = $strResult.Properties.Item("distinguishedName")
    Write-Host $strDN
}