Summary:

I currently own External Domain and a Wildcard Cert for this domain.  Ex. Broke.net

My internal AD domain is Ex. Fix.com (This name is owned by another company externally)

I have external access to webmail working.  My problem is when I try to connect Outlook 2013 internally I have a Certificate mismatch.  I cannot pruchase a SAN cert to include this internal domain because it is currently owned.

Do I have any options with Internal DNS to resolve my issue?  Any direction or help is greatly appreciated.

I have read numerous articles but I'm not an SSL/Exchange guy.  

Thank you,

WilleG

This article about pin-point DNS will apply to 2013 as well.

http://www.msexchange.org/articles-tutorials/exchange-server-2010/mobility-client-access/using-pinpoint-dns-zones-exchange-2010.html