We are changing our domain name. I've done this before a few years ago when
we were on GW8 and din't have any problems. We are on 2014 now and I can't
seem to get everything to work.

I have added the new domain in Internet Addressing and made it the preferred
domain. Doing that changed evryones email address in the GW address book,
althougjh it did say "Updated on LDAP server with one failure". Now it says
there are two failures every time I close out of the Internet Addressing

In any event, we have no issues receiving email sent to the new domain. I
have created the necessary records with our domain hosting service. The only
problem I seem to be having is that email sent out still shows as coming
from the old domain.

Any ideas on what I missed?