Our Active Directory domain was set up years ago with the same domain name as our public website (let's call it oldname.org). I understand now that that is not best practice, but that is what I inherited. Our Exchange server is simply named Exch2013, so it's name in our domain is Exch2013.oldname.org. However, when it was set up all the URLs were set up as exchange.oldname.org. We have an internal DNS entry by that name that points to the internal IP of the server as well as an external DNS entry by that name that points to an allotted IP for the server (for OWA and HTTPS access for Outlook clients outside the office). I did not configure this Exchange server (and the people who did are no longer at my disposal), so I'm not familiar with a lot of the actual terms and what they refer to (CAS, SCP, etc).
Our organization is changing its name, so I was tasked with changing our email addresses from @oldname.org addresses to @newname.org email addresses. I added another internal relay (weird I know, but have always used an internal relay setup, as Google Apps actually holds our MX records because we have a large organization but only want to use Exchange for our little office) just like the @oldname.org internal relay is setup. I made sure the Send Connectors were good. When it was time for the cut-over, I simply changed everyone's default Reply Address using our Email Address Policy. This worked great. Everyone is able to both send and receive as @newname.org. But there is a problem.
When someone goes outside of our office (off our LAN) and connects using Outlook (I think this is Outlook Anywhere?), they get a message saying "Allow this website to configure emailaddress@newname.org server settings?" It then lists the website as "http://www.oldname.org/autodiscover/autodiscover.xml" and says, "Your account was redirected to this website for settings." For further information, this message only appears for people who have created a new Outlook profile that auto-discovered their new @newname.org email address. If they open up their old profile that was setup (autodiscovered) when the email addresses were all @oldname.org, they don't get the redirect message.
I have not changed any settings on the Outlook Anywhere addresses or the Virtual Directories.
I've found plenty of stuff on Google on how to ignore that message using a registry edit, but what I want is to configure things properly so that the message does not appear. This technet article talks about the lack of need for autodiscover virtual directories, but if I'm honest, I didn't understand that very well. What do I need to be looking at? Is there a proper way to do this?