When a user sends an email to an external user with Request a Read Receipt, a Read Receipt is returned, however in To field is blank. (This is not the case for internal read receipts).
Sent: Friday, November 8, 2013 3:32:37 PM (UTC-05:00) Eastern Time (US & Canada)
was read on Friday, November 8, 2013 3:32:35 PM (UTC-05:00) Eastern Time (US & Canada).
How do I resolve this?
We are on Exchange 2013 CU2.