Getting OU of users into CSV created by script

Question

Hi.
I've found this script that let's us analyze mailbox Growth over time.
http://gallery.technet.microsoft.com/scriptcenter/Generate-report-of-user-e4e9afca  (script shown below)
But I need to add the OU of the user to the script as we are hosting different Companies on the Exchange server I'll be using it on. Therefore it' necessary to be able to sort by using the OU the users are located in.
I've found out that Get-MailboxStatisics cannot do this for me and therefore that a custom object has to be used. But to be honest I'm a total noob at scripting so I'll be very gratefull if anyone can help me out here and tell me how I should customize
the script below
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#requires -Version 2
param
 [Switch]$ExportMailboxSize,
 [Switch]$CompareMailboxSize,
 [String]$LogPath="C:\log",
 [String[]]$Identity,
 [DateTime]$StartDate,
 [DateTime]$EndDate
#region Export today's Mailbox Size
if ($ExportMailboxSize)
 $Counter=0
 $UserMailboxStatistics=@()
 if(-not ( Test-Path -Path $LogPath))
  New-Item -ItemType  directory -Path $LogPath
 #Get mailbox identity
 if (-not ($Identity))
  $UserMailboxs=Get-Mailbox -Filter 'RecipientTypeDetails -eq "UserMailbox"' -ResultSize unlimited
 else
  $UserMailboxs=$Identity|Get-Mailbox -Filter 'RecipientTypeDetails -eq "UserMailbox"' -ResultSize unlimited
 #Get SamAccountName,DisplayName and MailboxTotalItemSize for specific users or all users with mailbox.
 foreach ($UserMailbox in $UserMailboxs)
  $Counter++
  Write-Progress -Activity "Export MailboxStatistic" -Status "Exporting" -CurrentOperation $UserMailbox.DisplayName -PercentComplete ($counter/($UserMailboxs.Count)*100)
  $UserMailboxStatistic = New-Object PSObject
  $UserMailboxSizeB = (Get-MailboxStatistics -Identity $UserMailbox).TotalItemSize.Value.tobytes()
  $UserMailboxSizeMB = "{0:#.##}" -f ($UserMailboxSizeB/1mb)
  $UserMailboxStatistic | Add-Member -MemberType NoteProperty -Name "SamAccountName" -Value $UserMailbox.SamAccountName
  $UserMailboxStatistic | Add-Member -MemberType NoteProperty -Name "DisplayName" -Value $UserMailbox.DisplayName
  $UserMailboxStatistic | Add-Member -MemberType NoteProperty -Name "UserMailboxSizeMB" -Value $UserMailboxSizeMB
  $UserMailboxStatistics+=$UserMailboxStatistic
 #Output to a CSV file with date format "yyyy-MM-dd" as default name  ,in default path "C:\log". Path can be set by $logpath param.
 $UserMailboxStatistics|Export-Csv -Encoding default -NoTypeInformation -Path "$LogPath\$(get-date -Format "yyyy-MM-dd").csv"
#endregion
#region Compare Mailbox Size
if ($CompareMailboxSize)
 $TempCSVs=@()
 $report=@{}
 $index=-1
 #Check if path is correct
 if(-not ( Test-Path -Path $LogPath))
  Write-Error -Message "'$LogPath' doesn't exist, please make sure the path is correct"
  return
 [array]$CSVFiles=Get-ChildItem $LogPath -Exclude "Compare*"|Sort-Object -Property "CreationTime"
 #Summary all CSV files during the period,given by user 
 if ($StartDate -and $EndDate)
  foreach ($CSVFile in $CSVFiles)
   if ($CSVFile.CreationTime.date -ge $StartDate.date -and $CSVFile.CreationTime.date -le $EndDate.date)
    $TempCSVs+=$CSVFile
 else
  Write-Error -Message "StartDate or EndDate is not correct or not given. Please make sure the format is correct."
  return
 #Check wether CSV files exist during the period
 if (-not $TempCSVs)
  Write-Error "log file created from '$StartDate' to '$EndDate' doesn't exist in '$LogPath'. Please check."
  return
 else
  #Import these CSV files 
  foreach($TempCSV in $TempCSVs)
   $TempDate=$TempCSV.basename
   $counter=0
   $index++
   $UserMailboxStatistics=Import-Csv -Path $TempCSV.fullname
   #add user's mailbox status to report
   foreach ($UserMailboxStatistic in $UserMailboxStatistics)
    if (-not $report.ContainsKey($UserMailboxStatistic.SamAccountName))
     $TempUserMailboxStatistic=New-Object psobject
     $TempUserMailboxStatistic|Add-Member -MemberType NoteProperty -Name "SamAccountName" -Value $UserMailboxStatistic.SamAccountName
     $TempUserMailboxStatistic|Add-Member -MemberType NoteProperty -Name "DisplayName" -Value $UserMailboxStatistic.DisplayName
     $TempUserMailboxStatistic|Add-Member -MemberType NoteProperty -Name "Remark" -Value "Online"
     for ($i=0;$i -lt $TempCSVs.count;$i++)
      $TempUserMailboxStatistic|Add-Member -MemberType NoteProperty -Name "$($TempCSVs[$i].basename)" -Value "N/A"
     $report.Add($UserMailboxStatistic.SamAccountName,$TempUserMailboxStatistic)
    #write progress
    $Counter++
    Write-Progress -Activity "Compare MailboxSize on $TempDate" -Status "Comparing"`
    -CurrentOperation $TempUserMailboxStatistic.DisplayName -PercentComplete ($counter / ($UserMailboxStatistics.Count) * 100)
    $report[$UserMailboxStatistic.SamAccountName].$TempDate=$UserMailboxStatistic.UserMailboxSizeMB
   #check wether users' mailboxes were removed or added.
   $report.values|%{`
   if ($_.$TempDate -eq "N/A" -and $_.Remark -notlike "Remove*")`
    {$_.Remark="Removed on $TempDate"};`
   if ($_.$TempDate -ne "N/A" -and $index -ne 0 -and $_.$($TempCSVs[$index-1].basename) -eq "N/A")`
    {$_.Remark="Added on $TempDate"}}
 #Export report to CSV file
 $report.Values|Export-Csv -Encoding default -NoTypeInformation -Path "$LogPath\Compare$(get-date $StartDate -Format "yyyy-MM-dd")TO$(get-date $EndDate -Format "yyyy-MM-dd").csv"
#endregion
if (-not $ExportMailboxSize -and -not $CompareMailboxSize)
Write-Warning -Message "You did not choose any task. Please choose one."

Answer 1

StoreThomas,
At the top of this script, you will see a section where the user mailboxes are collected then each is checked.  Line 45 starts this section.  Just under that, you can see that a custom psObject is created (line 50) and defined (the next 5
lines) and added to an overall list of mailbox statistics (line 56).  You can add an Add-Member line before line 56 that says the following:
$UserMailboxStatistic | Add-Member -MemberType NoteProperty -Name "OrgUnit" -Value $UserMailbox.OrganizationalUnit
That should add your OU to the list of exported fields, and you can use Excel to open and filter that list.