Exchange list is really quiet, struggling with an issue here. Sorry.
I rolled up a new Exchange 2010 CAS/Hub and decommissioned the old one. Transferred all the URL's, and swapped IP's. Internal and external flow is great, OWA is fine, external OWA and Active Sync is fine. Internal existing Outlook users are broke. A regular user cannot find the new server when they start up, and domain admin with an email box can. Feels like permissions on Autodiscover.xml or auth on Autodiscover but I have check that a million times.

