Lets see what are the Public DNS records we need to Configure for Exchange 2013 (Client Access / mail flow / Autodiscover)

Create A record – Mail.CareExchange.in

and point to the Exchange 2013 Server .

If the server is load balanced – You will have to point to the VIP (Virtual IP of the load balancer)

Which will be the internet facing server for your Webmail and all other URLs

Create a CNAME Record – autodiscover.careexchange.in

and point to the A record you created above

Which will server your outlook and Active Sync phones to send configuration settings automatically.

Create a MX record – and point to the A record you created above

Which will serve your mail flow

if you are going to use any Cloud based anti – spam . you will have to point it to their MX.