title: How to get the content of a ItemAttachment (Message) with EWS?
body: <p>When I retrieve the attachments of one email the FileAttachment has a content key filled.</p>
  <p>For the ItemAttachment (for an email attached) there is no content at all. I'm able to get the content with getRawMessage passing the AttachmentId-&gt;Id as parameter with normal accounts.</p>
  <p>We have a special situation where we try to get the content of an attached email in an delegated mailbox in a exchange server installed locally and this solution is not working, the getRawMessage(Attachment-&gt;AttachmentId-&gt;Id) is empty.</p>
  <p>The is another way to get the content of an attached email?</p>
  <p>I'm using ews and php</p>