How to search for Large Emails in OWA (Outlook Web App)

  1. Login to OWA
  2. Underneath the “Search Entire Mailbox”  there is a dropdown menu that is most likely defaulted to “Date”. 
  3. Click on that menu and choose “Size”  (Shown below)
  4. After that all of the messages will be organized by size.  The messages will be grouped by the sizes and in the header for those groups the sizes will be displayed.  If need be you can click on the particular email and view the sizes of each individual attachment.