title: Sending from a shared mailbox without using sentOnBehalfOf
body: <p>I'm currently using <code>outlook.application</code> to send mail from a shared mailbox. </p>
  
  <p>I need a way to send these messages without my email address appearing on the 'from' list. It should only be the shared mailbox appearing. At the moment i'm using <code>.sentOnBehalfOf</code>, is there something else i should be using?</p>