Office 365, Email, Exchange, How do I view mail headers?

How can I get Header information in Microsoft Exchange?

To access Internet Mail Header information for an email:

  1. Open a browser.
  2. Log in to the Outlook Web App at
  3. Locate the message for which you want information.
  4. Click the More actions (...) button next to the reply and forward buttons, then select View > View message details. 
  5. The Message details box contains the Internet Mail Headers information.