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I need to publish the exchange service to the internet. I need a basic help with the DNS configuration of my unique registrar service.

On the registrar site: I configure a DNS "A" Record that reference to my enterprise public IP exchange.myenterprise.com -> Public Static Ip of my enterprise.

It Works.

Now I've to do the same thing with the "autodiscover" service. Have I to introduce a new DNS record type A that reference with the same public IP of my enterpise?

autodiscover.myenterprise.com -> Public Static Ip of my enterprise

Is it possible to have a multiple host that reference with the same public IP?

Can this interfere with the other DNS record (exchange.myenterprise.com) that works correctly up to now?

Note: the autodiscover service runs correctly into the enterpise LAN.

Thank you so much for your help.

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Yes you can have multiple A Records that point to the same Public IP address and internal server. That is quite normal.

The way to look at it is:

Your exchange server runs both the autodiscover & the mail service so you can indeed have both pointing to the same exchange server.

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  • Yes, I agree with @Ankh2015. you have have multiple DNS records pointing to same public IP.
    – Amir
    Apr 23, 2015 at 10:14

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