Is there a way to get NDR's sent to a specified user as well as to the original sender.
Exchange does this - it will send a NDR to the mail's sender and to the admin.
Also, exchange could send a mail to the admin account if it did not find the user email address - ie say firstname.lastname@example.org does not exist it will send the mail to email@example.com saying it can't find the recipient. You can then see it is supposed to go to firstname.lastname@example.org and forward it to the correct recipient.
Thanks in advance for your help!!