troubleshooting Question

split dns question and using cname instead of A records

Avatar of creative555
creative555 asked on
Microsoft 365ExchangeAzure
3 Comments1 Solution483 ViewsLast Modified:
I am running everything in Azure - 2013 Exchange which is Hybrid and 2010 Sp3 Exchange.
Since IPs might change when machine is shut I was reading somewhere that it is advisable to use CNAME instead of A records so instead of pointing to IP, I could use CNAME and point to Exchange2013 hostname

So, I need two records mail and autodiscover for 2013 server. Also, my internal Domain is contoso.local (non routable) and I setup DNS forward lookup zone for domain that is routable -

So, I have local domain - contoso.local and external domain setup as forward lookup zone in internal DNS-

what internal DNS records to I need to setup?  Can I setup cname records in both forward lookup zones?

For example:
Contoso.local DNS forward lookup zone
CNAME autodiscover.contoso.local    points to exchange2013.contoso.local
MX record mail.contoso.local points to exchange2013.contoso.loca

Externaldomain forward lookup zone on internal DNS
CNAME  points to exchange2013.contoso.local
CNAME points to exchange2013.contoso.local

Please note that because I used digi cert and it doesn't support non-routable domains such as contoso.local, they advise to use external names for exchange server
Please help
Jason Crawford
Transport Ninja

Our community of experts have been thoroughly vetted for their expertise and industry experience.

Log in to continue reading
Become an EE member today7-DAY FREE TRIAL
Members can start a 7-Day Free trial then enjoy unlimited access to the platform for $9.99/mo
View membership options
Unlock 1 Answer and 3 Comments.
Learn why we charge membership fees
We get it - no one likes a content blocker. Take one extra minute and find out why we block content.
See how we're fighting big data
The Value of Experts Exchange in My Daily IT Life

Experts Exchange (EE) has become my company's go-to resource to get answers. I've used EE to make decisions, solve problems and even save customers. OutagesIO has been a challenging project and... Keep reading >>


Owner of Outages.IO
Phoenix, Arizona, United States
Member Since 2016
Join a full scale community that combines the best parts of other tools into one platform.
Unlock 1 Answer and 3 Comments.
View membership options
“All of life is about relationships, and EE has made a virtual community a real community. It lifts everyone's boat.”
William Peck

Member since 2004