Outlook 2016 autodiscovery not working RRS feed

  • Question

  • Dear All!

    I have a problem with a 2011 SBS server running Exchange 2010. The server has a fixed IP address, the host name is:

    This hostname is set as the primary MX server and the autodiscovery.mydomain.hu cname record is set to point to mail.mydomain.hu

    Our problem is that from our client computers Outlook (2016 and 2019, OEM subscriptions) we can't connect to our mail server either in-house or from remote locations (internal and external DNS are set to have autodiscovery and mx records). Since I can't set up my Exchange account manually, I'm helpless. It still works with previous Outlook. It also worked with the new Outlook a few months ago and we have set up multiple accounts this year, and it has evolved overnight. We tried several machines and it doesn't work. I also tried to create an SRV record but unfortunately it didn't work.

    On a working machine, we opened the "Test Automatic Email Configuration" menu in Outlook, which returned an httpStatus = 500 error message. Or,
    Starting automatic detection: https://mail.mydomain.hu/Autodiscover/Autodiscover.xml - Failed (0x800C820F)

    And after logging in to webmail, I get 600 error code after typing the above xml address, which is a good sign I beleive.

    I'd like some help with the problem. Thanks in advance.

    Monday, December 2, 2019 1:18 PM

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