[cisco-voip] Turning off Playback of "Undeliverable" message in Exchange

[Mendoza, Anthony]

All,
 
I've figured out how to turn off the feature which plays back read
receipts on the  handset when checking messages.  However, I have not
found the option to turn off "Undeliverable" messages.  For example.  If
I sent out an email to a Distribution List and some members have full
mailboxes or no longer exist, I get the standard Exchange bounce back.
This message (if marked as new) shows up as "new" message if I'm calling
in.  This is somewhat distracting for our end users since they only want
to hear about voicemail, not email when checking their Voicemail over
the phone.  Is there an additional option to turn this off?

We're on Unity 4.x on top of Exchange 2003.

Thanks,
-Anthony