Since upgrading to Exchange 2013, an auto response feature which was working has stopped working.
A mailbox get emails from an email address firstname.lastname@example.org (consistent address) which will include another email address (which is a variable) in the to field (for example, email@example.com).
They have a client side rule setup which sends an auto reply to all emails received to this mailbox, but would like either this rule edited, or another setup which sends emails to any other email addresses included in the to field on the original mail from firstname.lastname@example.org, to get the same automatic response. I'm not too sure whether it does something clever with discovering the email address in the to field, but I've had a look through all the client side / exchange side rules and done a bit of research, and can't find anything appropriate for what we need. I have also tested, and the client side only rule which will only send to the sending address the auto response rather than all parties included in the to field of the original email.
I want to say this is not possible, but this was working perfectly well for ages until we migrated from 2010 to 2013. Any ideas or thoughts on this would be very helpful!