Script to count computers in AD which have changed computer password within a certain period

This script will count the number of Windows computers (excluding servers) in Active Directory under the specified path which have changed computer password within the last 90 days.

When the script completes it will write the computer Count to the prompt and it will send an email with a csv file attached to the specified recipients.

Modify the following variables:

• Smtpserver – Name of the smtpserver / relay
• From – Mail address which should appear as sender (Could be the name of the server from which the mail is sent)
• Recipient – Mail address of the recipient(s).
• ComputerpasswordAgeDays – Number of days since the password was last changed.
• ADSearchBase – OU to search for computers. DistinguishedName attribute from AD.

$m = Get-Module -List ActiveDirectory
if(!$m) {
    Write-Host "AD Powershell Module is not installed. Install it and run the script again."
    Exit
}

else{
    Import-Module ActiveDirectory
}


#Mail
$smtpServer = "ex01.domain.com"
$from = "MAN01@domain.com"
$recipient = "user@domain.com"

#Variables
[string]$SavePath = "$PSScriptRoot\reports"
[int]$ComputerPasswordAgeDays = 90
[string]$ADSearchBase = "DC=domain,DC=com"


#--------------------------------------
#Name: sendMail 
#Arguments: 2 Arguments:
#           1. Computer Count
#           2. File to be attached
#Return: -
#Description: Sends an E-mail to recipient defined in $recipient containing the csv file and computer count.
#--------------------------------------

function sendMail{

     $mailinfo_computer_count = $args[0]
     $file = $args[1]
  

    $body = "Computers which have changed computer password within the last $ComputerPasswordAgeDays days.</br></br>"
    $body += $mailinfo_computer_count

    $subject = "Antal computere: " + $mailinfo_computer_count
    
                 
     #Sending email 
     Send-MailMessage -SmtpServer $smtpServer -From $from -To $recipient -Subject $subject -Body $body -BodyAsHtml -Attachments $file
  
}


$Date = (Get-Date -format "MM-dd-yyyy")
IF ((test-path $SavePath) -eq $False) { md $SavePath }
$ExportFile = "$SavePath\Workstations-$Date.csv"
$ComputerStaleDate = (Get-Date).AddDays(-$ComputerPasswordAgeDays)
$Computers = Get-ADComputer -SearchBase $ADSearchBase -filter { (passwordLastSet -ge $ComputerStaleDate) -and (OperatingSystem -notlike "*Server*") -and (OperatingSystem -like "*Windows*") } -properties Name, DistinguishedName, OperatingSystem,OperatingSystemServicePack, passwordLastSet,LastLogonDate,Description
$ComputerTrimmed = $Computers.Count
write-output "Number of computers: " ($ComputerTrimmed) 

$Computers | export-csv $ExportFile -NoTypeInformation
sendMail $ComputerTrimmed $ExportFile