Office365 Hybrid - Autodiscover CNAME error o.O

Hello guys and girls :-)
My Office365 Domain DNS checker at Office 365 Admin Portal the Exchange online session shows a AUTODISCOVER cname dns issue:

DNS needed: autodiscover.outlook.com
DNS find: autodiscover.outlook.com.mydomain.com

Capturar.JPG

With Google DIG toolbox and DNS Checker.org the results are the same: CNAME: autodiscover.outlook.com.mydomain.com

Sem-t-tulo.jpg
My external DNS provider reported that there is no such dns entry "autodiscover.outlook.com.mydomain.com" in external dns. Where is this coming from? Anybody know?  ('-' )
LVL 1
adrecalAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Todd NelsonSystems EngineerCommented:
"autodiscover.outlook.com.mydomain.com" is not a valid CNAME or A record value for O365.

You will need to update or add your DNS CNAME or A record for autodiscover ("autodiscover.mydomain.com") so that the target is "autodiscover.outlook.com"
0
adrecalAuthor Commented:
Todd Did you read my question? I know it is wrong, but I do not know where this wrong record comes from since my external dns provider said that I did not have this wrong record.
0
Todd NelsonSystems EngineerCommented:
Have you used MXToolbox.com to review your public DNS records?

My guess is that if you don't have control of being able to manually change your public DNS records, the DNS host input something incorrectly.
0
adrecalAuthor Commented:
Hi guys.
The error is:

CNAME: autodiscover PTR: autodiscover.outlook.com

The correct is:

CNAME: autodiscover PTR: autodiscover.outlook.com. (look at point after outlook.com)
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
adrecalAuthor Commented:
After hours and hours and hours I founded this article: https://msft.engineer/how-to-configure-bind-dns-on-linux-for-office-365-316e96a86598
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Microsoft Office

From novice to tech pro — start learning today.