A PowerShell script to display an Active Directory domain in colorized and tree form.

Show-Domain.ps1

# requires -versoin 5.1
# requires -module ActiveDirectory
Function Show-DomainTree {
[cmdletbinding()]
[OutputType("String")]
[alias("dt")]
Param(
    [Parameter(Position = 0, HelpMessage = "Specify the domain name. The default is the user domain.")]
    [ValidateNotNullOrEmpty()]
    [string]$Name = $env:USERDOMAIN,
    [Parameter(HelpMessage = "Specify a domain controller to query.")]
    [alias("dc","domaincontroller")]
    [string]$Server,
    [Parameter(HelpMessage = "Specify an alternate credential.")]
    [alias("RunAs")]
    [PSCredential]$Credential,
    [Parameter(HelpMessage = "Display the domain tree using distinguished names.")]
    [alias("dn")]
    [switch]$UseDN,
    [Parameter(HelpMessage = "Include containers and non-OU elements. Items with a GUID in the name will be omitted.")]
    [alias("cn")]
    [switch]$Containers
    )

    Write-Verbose "Starting $($myinvocation.MyCommand)"

    Function Get-OUTree {
      [cmdletbinding()]
        Param(
          [string]$Path = (Get-ADDomain).DistinguishedName,
          [string]$Server,
          [Parameter(HelpMessage = "Specify an alternate credential")]
          [PSCredential]$Credential,
          [Parameter(HelpMessage = "Display the distinguishedname")]
          [switch]$UseDN,
          [Parameter(HelpMessage = "Include containers")]
          [alias("cn")]
          [switch]$Containers,
          [Parameter(HelpMessage = "Used in recursion only. You don't need to specify anything")]
          [Int]$Indent=1,
          [Parameter(HelpMessage = "Used in recursion only. You don't need to specify anything")]
          [switch]$Children
          )

        Write-Verbose "Searching path $path"
        function GetIndentString {
          [CmdletBinding()]
          Param([int]$Indent)

          $charHash = @{
            upperLeft  = [char]0x250c
            upperRight = [char]0x2510
            lowerRight = [char]0x2518
            lowerLeft  = [char]0x2514
            horizontal = [char]0x2500
            vertical   = [char]0x2502
            join       = [char]0x251c
        }

          if ($Children) {

            if ($indent -eq 5) {
              $indent+=2
            }
            elseif ($indent -eq 7) {
              $indent+=4
            }

            $pad= " "*($Indent)

            if ($script:IsLast) {
              #write-Host "LAST" -ForegroundColor magenta
              $str+=" $pad{0}{1} " -f $charHash.join,([string]$charHash.horizontal * 2 )
            }
            else {
              $str+="{0}$pad{1}{2} " -f $charHash.vertical,$charHash.join,([string]$charHash.horizontal * 2 )
            }

          }
          else {
            if ($script:IsLast) {
              $c = $charHash.lowerleft
            }
            else {
              $c =$charHash.join
            }
            $str = "{0}{1} " -f $c,([string]$charHash.horizontal * 2 )

          }

          $str
      }

        #GUID Regex
        [regex]$Guid = "\w{8}-(\w{4}-){3}\w{12}"
        #parameters to splat for the search
        if ($Containers) {
          $filter = "(|(objectclass=container)(objectclass=organizationalUnit))"
        }
        else {
          $filter = "objectclass=organizationalUnit"
        }
        $search = @{
          LDAPFilter  = $filter
          SearchScope = "OneLevel"
          SearchBase  = $path
          Properties  = "ProtectedFromAccidentalDeletion"
        }

        "Server","Credential" | foreach-Object {
          if ($PSBoundParameters.ContainsKey($_)) {
            $search.Add($_,$PSBoundParameters[$_])
          }
        }

        $data = Get-ADObject @search | Sort-Object -Property DistinguishedName

        if ($Containers) {
          #filter out GUID named entries
          $data = $data | where-object {$_.name -notmatch $GUID}
        }
        if ($path -match "^DC\=") {
          $top = $data
          $last = $top[-1].distinguishedname
          $script:IsLast = $False
          Write-Verbose "Last top level is $last"
        }
        if ($data ) {
          $data | Foreach-Object {
          if ($UseDN) {
            $name = $_.distinguishedname
          }
          else {
            $name = $_.name
          }

          if ($script:IsLast) {
            Write-Verbose "Processing last items"
          }
          else {
            $script:IsLast = $_.distinguishedname -eq $last

          }

          if ($_.ProtectedFromAccidentalDeletion) {
              #display protected OUs in color
              $nameValue = "$([char]0x1b)[38;5;199m$name$([char]0x1b)[0m"
          }
          elseif ($_.objectclass -eq 'container') {
              $nameValue = "$([char]0x1b)[38;5;3m$name$([char]0x1b)[0m"
          }
          elseif ($_.objectclass -ne 'organizationalUnit') {
              #display non-OU and non-Container in a different color
              $nameValue = "$([char]0x1b)[38;5;211m$name$([char]0x1b)[0m"
          }
          else {
              $nameValue = "$([char]0x1b)[38;5;191m$name$([char]0x1b)[0m"
          }

          "{0}{1}" -f (GetIndentString -indent $indent),$nameValue

          $PSBoundParameters["Path"] = $_.DistinguishedName
          $PSBoundParameters["Indent"] = $Indent+2
          $PSBoundParameters["children"] = $True
          #call the nested function recursively
          Get-OUTree @PSBoundParameters
        }
      } #if $data

  }

    if ($host.name -eq 'ConsoleHost') {
      $getAD = @{
        ErrorAction = "stop"
        Identity = $Name
      }
      "Server","Credential" | foreach-Object {
        if ($PSBoundParameters.ContainsKey($_)) {
          $getAD.Add($_,$PSBoundParameters[$_])
        }
      }

      Try {
        Write-Verbose "Getting distinguished name for $($Name.toUpper())"
        $getAD | Out-String | Write-Verbose
        [string]$Path = (Get-ADDomain @getAD).DistinguishedName
        #Passing these bound parameters to another function which needs the Path
        $PSBoundParameters.add("Path",$Path)
        [void]($PSBoundParameters.remove("Name"))
      }
      Catch {
        Throw $_
      }
    #display to top level container and then get children
    $top = @"

$([char]0x1b)[1;4;92m$Path$([char]0x1b)[0m
$([char]0x2502)
"@

    $top
    #get child OUs
    Get-OUTree @PSBoundParameters

    #display a footer
    $tz = Get-TimeZone
    if ((Get-Date).IsDaylightSavingTime()) {
        $tzname = $tz.daylightName
    }
    else {
        $tzname = $tz.StandardName
    }
    $date = Get-Date -format g
    $footer = @"

$([char]0x1b)[38;5;191mOrganizationl Units$([char]0x1b)[0m
$([char]0x1b)[38;5;199mProtected from Deletion$([char]0x1b)[0m
$([char]0x1b)[38;5;3mContainers$([char]0x1b)[0m
$([char]0x1b)[38;5;211mOther$([char]0x1b)[0m

$([char]0x1b)[38;5;11m$date $tzname$([char]0x1b)[0m
"@

$footer
}
else {
    Write-Host "This command should be run in a PowerShell Console host." -ForegroundColor magenta
}
  Write-Verbose "Ending $($myinvocation.MyCommand)"
}