John Watson wrote:
Can someone please advise how to show the list of Bcc recipients in a
sent message. I have used the Other Actions button on the ribbon to
toggle the Message Source but Bcc refuses to show. I have tried some
test messages with on Bcc recipient but to no avail. Is there an
option elsewhere to set this?

If you open the message that is in your sent items, you should see the Bcc
field there. Do you not?

--
f.h.