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Phone List AD GAL update utility – An alternate to bulk imports

If you have been administrating mail systems for a while (and then some) then you have probably had to do a bulk update or two of one or more AD properties like phone numbers and address information. Depending on the time you have and your skill at building scripts you may have had some good and not so good experiences at this. The frustrating thing can be a script you build for one problem maybe be completely useless for the next and you may find yourself again spending time you don’t have building another script. Well because I’ve had to do this one too many times I came up with the following little script that allows dynamic matching of columns in a CSV file to import data into Active Directory. The other thing this script does is actually checks the current value within AD as not to update an already existing property and it’s a latched script so doesn’t allow you to update anything without clicking yes. The later could get frustrating but it’s a lot less frustrating then trying to fix a poorly tested bulk import.

How does it work

Powershell has a great little commandlet called import-csv that make importing data from a CSV prospective pretty easy. The script will pick the first line as column headers and then populate enough drop down Gui elements so you can map as many of the fields you want from the CSV file to AD properties.

Primary Mapping Field

This is the field that is used to identify the AD object to update note the field you select here doesn't get updated. In this field you generally need to pick a field that can be used to unique identify the accounts you want to update. The best to use generally is the Mail property mostly because phone lists generally always contain this information. What happens when the script runs is it uses this information to create a dynamic ADSI query based on the values that you select. Eg if you select the mail property it will try to find the AD account to update by doing a search for any user account with this email address, note if you want to do object other then AD useraccount you will need to fiddle with the LDAP query.

Update fields

I've limited the update fields to fields that are reasonably safe to to do a bulk update on instead of reusing the dynamic map from the primary map. If you want to add any fields you need to add the exact name of the Ldap attribute to the list eg


(the 0 is just a blank for the hashtable.)

I've put a download of this code here

The code itself looks like

$form = new-object System.Windows.Forms.form

$Filecolumns = @{ }
$ADprops = @{ }
$DropDownValues = @{ }
$mbcombCollection = @()

function UpdateAD(){
$dd = "Name"
Import-Csv $fileOpen.FileName.ToString() foreach-object{
#Find User
$root = [ADSI]'LDAP://RootDSE'
$dfDefaultRootPath = "LDAP://" + $root.DefaultNamingContext.tostring()
$dfRoot = [ADSI]$dfDefaultRootPath
$gfGALQueryFilter = "(&(&(&(& (mailnickname=*)(objectCategory=person)(objectClass=user)(" + $ppDrop.SelectedItem.ToString() + "=" + $_.($ppDrop1.SelectedItem.ToString()).ToString() + ")))))"
$dfsearcher = new-object System.DirectoryServices.DirectorySearcher($dfRoot)
$dfsearcher.Filter = $gfGALQueryFilter
$updateString = ""
$srSearchResult = $dfsearcher.FindOne()
if ($srSearchResult -ne $null){
$uoUserobject = $srSearchResult.GetDirectoryEntry()
Write-host $uoUserobject.DisplayName
foreach($mapping in $mbcombCollection){
if ($mapping.CSVField.SelectedItem -ne $null){
$updateString = $updateString + "User : " + $uoUserobject.DisplayName.ToString() + "`r`n"
$nval = $_.($mapping.CSVField.SelectedItem.ToString()).ToString()
$updateString = $updateString + "Property : " + $mapping.ADField.SelectedItem.ToString() + " Current Value : " + $uoUserobject.($mapping.ADField.SelectedItem.ToString()).ToString() + "`r`n"
$updateString = $updateString + "Update To Value : " + $_.($mapping.CSVField.SelectedItem.ToString()).ToString()
if (($uoUserobject.($mapping.ADField.SelectedItem.ToString()).ToString()) -ne $nval){
$result = [Microsoft.VisualBasic.Interaction]::MsgBox($updateString , 'YesNo,Question', "Confirm Change")
switch ($result) {
'Yes' {
$uoUserobject.($mapping.ADField.SelectedItem.ToString()) = $nval




$windowsIdentity = [System.Security.Principal.WindowsIdentity]::GetCurrent()
$sidbind = "LDAP://<SID=" + $windowsIdentity.user.Value.ToString() + ">"
$aceuser = [ADSI]$sidbind

# Add Primary Prop Drop Down
$ppDrop = new-object System.Windows.Forms.ComboBox
$ppDrop.Location = new-object System.Drawing.Size(190,40)
$ppDrop.Size = new-object System.Drawing.Size(200,30)
foreach ($prop in ${
foreach($name in $prop.PropertyNames){
if ($name -ne $null){$ppDrop.Items.Add($name)}



# Add Primary Prop Drop Down
$ppDrop1 = new-object System.Windows.Forms.ComboBox
$ppDrop1.Location = new-object System.Drawing.Size(20,40)
$ppDrop1.Size = new-object System.Drawing.Size(150,30)

$fileOpen = New-Object System.Windows.Forms.OpenFileDialog
$fileOpen.InitialDirectory = $Directory
$fileOpen.Filter = "csv files (*.csv)*.csv"
$fileOpen.Title = "Import File"

Import-Csv $fileOpen.FileName.ToString() select -first 1 %{$_.PSObject.Properties} foreach-object {
$Filecolumns.GetEnumerator() sort name foreach-object {

$dloc = 120

$Filecolumns.GetEnumerator() foreach-object {
$mbcomb = "" select CSVField,ADfield
$dloc = $dloc + 25
$ppDrop2 = new-object System.Windows.Forms.ComboBox
$ppDrop2.Size = new-object System.Drawing.Size(200,30)
$ppDrop2.Location = new-object System.Drawing.Size(190,$dloc)
$ADprops.GetEnumerator() sort name foreach-object {
$mbcomb.ADfield = $ppDrop2

$ppDrop3 = new-object System.Windows.Forms.ComboBox
$ppDrop3.Size = new-object System.Drawing.Size(150,30)
$ppDrop3.Location = new-object System.Drawing.Size(20,$dloc)
$Filecolumns.GetEnumerator() sort name foreach-object {
$mbcomb.CSVField = $ppDrop3
$mbcombCollection += $mbcomb

$Gbox = new-object System.Windows.Forms.GroupBox
$Gbox.Location = new-object System.Drawing.Size(10,5)
$Gbox.Size = new-object System.Drawing.Size(400,100)
$Gbox.Text = "Primary Mapping field"

$Gbox = new-object System.Windows.Forms.GroupBox
$Gbox.Location = new-object System.Drawing.Size(10,120)
$Gbox.Size = new-object System.Drawing.Size(400,800)
$Gbox.Text = "Update Fields "

# Add Export MB Button

$exButton1 = new-object System.Windows.Forms.Button
$exButton1.Location = new-object System.Drawing.Size(420,10)
$exButton1.Size = new-object System.Drawing.Size(125,20)
$exButton1.Text = "Update AD"

$form.Text = "AD Phone List Update GUI"
$form.size = new-object System.Drawing.Size(1000,700)
$form.autoscroll = $true

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All sample scripts and source code is provided by for illustrative purposes only. All examples are untested in different environments and therefore, I cannot guarantee or imply reliability, serviceability, or function of these programs.

All code contained herein is provided to you "AS IS" without any warranties of any kind. The implied warranties of non-infringement, merchantability and fitness for a particular purpose are expressly disclaimed.