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K B
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What DNS zones are absolutely necessary for Exchange Hybrid 2013/2007 (365) environment

If I was going to use autod feature of Set-HybridConfiguration:

Set-HybridConfiguration –Domains "contoso.com, fabrikam.com", "autod:wingtiptoys.com"

… which is now found in the GUI of the Hybrid Configuration Wizard…

As a hypothetical, would I need ANY DNS zones at all (either internal or external) for fabrikam.com or contoso.com?

Could they be non-existent with the exception of MX records externally?
Active DirectoryMicrosoft 365ExchangeDNSAzure

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K B

8/22/2022 - Mon
Peter Hutchison

You need MX, TEXT, SPF and a CNAME record which are needed to verify that you are the owner of the domain and for autodiscover to work for Outlook and mobile devices.
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K B

ASKER
spent DAYS on this.. Microsoft has zero documentation explaining how their statement of:

With the Autodiscover domain feature, you have the option of setting one of your SMTP domains as the Autodiscover domain. When doing so, you remove the following requirements:

The need to create an Autodiscover record for all SMTP domains in DNS, except for the domain you set as the Autodiscover domain
The need to include the Autodiscover FQDN for all SMTP domains used in the SAN certificate

... IS ONLY FOR INTERNAL DNS.. EXTERNALLY THIS STATEMENT IS FALSE

FOR IT TO BE SUPPORTED YOU NEED TO HAVE EVERY SINGLE NAME ON THE CERTIFICATE
I started with Experts Exchange in 2004 and it's been a mainstay of my professional computing life since. It helped me launch a career as a programmer / Oracle data analyst
William Peck