Modify script to use Office365 and port 587

I would like to change this script so that uses the smtp server:  smtp.office365.com
Port 587
Encryption TLS
Username:  username@yourdomain.com
Password: xxxx



###PROGRAM START###
      # Invokes the Send-MailMessage function to send notification email
      $splat = @{
            From =                  'info@info.com'
            To =                  Get-Content -Path ( Join-Path $PSScriptRoot 'DistributionList.txt')
            SmtpServer =      'smtp.server.com'
            Subject =            $subject
            body =                  $MessageBody
            BodyAsHtml =      $true
            Attachment =      ( Join-Path $PSScriptRoot 'abc.pdf' )
      }
      Send-MailMessage @splat
###PROGRAM END###