Send-PasswordExpiryReminderEmail

Function Send-PasswordExpiryReminderEmail {
param (
        [string]$ToAddress
    )

    $FromAddress = '=== ENTER FROM EMAIL HERE ==='
    $SmtpServer = 'smtp.office365.com'
    $SmtpPort = '587'
    $Attachments = '==ENTER Attachment Here==='

    $UserName = '== ENTER USERNAME HERE'
    $Password = ConvertTo-SecureString "==== ENTER PASSWORD =====" -AsPlainText -Force
    $smtpCred = New-Object System.Management.Automation.PSCredential($username, $password)

    $mailParam = @{
        To = $ToAddress
        From = $FromAddress
        Subject = 'Mail Migration Test'
        Body = 'Your Teranet Password will expire in 5 days. `
                Please read the inlcuded document on how to reset your password. `
                This is an unmonitored email address. Please do not reply.'
        SmtpServer = $SmtpServer
        Port = $SmtpPort
        Credential = $smtpCred
        Attachments = $Attachments
    }
    Send-MailMessage @mailParam -UseSsl
}


$SearchBase = 'OU=Users,OU=Winnipeg,OU=MB,OU=TPR,DC=tprmb,DC=ca'
$users = Get-ADUser -SearchBase $SearchBase -filter {Enabled -eq $True -and PasswordNeverExpires -eq $False} -Properties "SamAccountName","msDS-UserPasswordExpiryTimeComputed",mail |
  Select-Object -Property "SamAccountName",Mail, @{Name="PwdExpiryDate"; Expression={[datetime]::FromFileTime($_."msDS-UserPasswordExpiryTimeComputed")}}

$TodaysDate = get-date
foreach ($user in $users){
    if ($null -ne $user.mail){
        $ts = New-TimeSpan -start $TodaysDate -end $user.PwdExpiryDate
        $DaysUntilExpiry = $ts.Days
         if($DaysUntilExpiry -eq 5){
            write-host $user.Mail "-" $DaysUntilExpiry
            Send-PasswordExpiryReminderEmail -ToAddress $user.Mail
         }
    }
}