I have setup an exchange 2013 server and so far it is up and running. I can access OWA and al the server side of things looks good but I do not understand how to setup the DNS settings. I have a IP for the exchange box alone and an A record of mail.example.com to the IP also MX Records pointing to mail.example.com.
The parts that is eluding me is who to configure the DNS within exchange. I have a DC running DNS internally and use both a External DNS from my ISP and OpenDNS.
Do I need to contact my ISP to setup a PTR? or what would they need to do?
Internal I typically setup the same records like autodiscover and mail on the DNS server itself. When you install exchange you setup the URLs you specified so those are set to whatever you specified and internal and external DNS are just to point to those specific URLs and used when it comes to a certificate.