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Outlook 2010 AutoDiscover Error

Posted on 2013-12-06
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Last Modified: 2014-02-10
Hi Experts,

I have a bit of a strange problem with one of my remote worker's laptops. They are suddenly unable to use Outlook. We are getting the following message:

Allow this website to configure user@domain.com server settings?
https://cpanelemaildiscovery.cpanel.net/autodiscover/autodiscover.xml

Your account was redirected to this website for settings.


Cancelling out of it does not allow Outlook to connect. Seems malicious to me. They are also unable to connect to our Outlook Web Access page. It simply comes up as Page Not Found (but works on other machines I've tested just fine).

I've run Malwarebytes to see if anything was found and it did find one item and removed it. Any thoughts on how to resolve this? I don't see anything strange in the DNS settings.
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Question by:ttotus
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8 Comments
 
LVL 63

Expert Comment

by:Simon Butler (Sembee)
ID: 39701067
This is nothing wrong with your system, malware or anything else.
The problem is with your web host.

The hosting control panel CPANEL uses Autodiscover for its own configuration and can take over.
You need to ensure that Autodiscover.example.com resolves to your external IP address correctly, as does your address for OWA.
If you browse to https://example.com/Autodiscover/Autodiscover.xml you may well get a prompt and then some XML. Your web host needs to disable that functionality.

Simon.
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Author Comment

by:ttotus
ID: 39701085
We host Exchange in-house but I do not manage it. Why would the OWA site not work for this individual user but it works for others using the same URL if that's the case?
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LVL 63

Expert Comment

by:Simon Butler (Sembee)
ID: 39701164
I am not talking about hosting Exchange, but the public web site.
Does the host name resolve to the correct place from the user's workstation?

Simon.
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LVL 5

Expert Comment

by:Pavel Nagaev
ID: 39705767
The problem is that you work with Exchange hosting provider. They unable to buy SSL certificate with names for all hosted organizations. That is why they bought only certificate with name  cpanelemaildiscovery.cpanel.net and configure Outlook to redirect autodiscover for your domain  to https://cpanelemaildiscovery.cpanel.net/autodiscover/autodiscover.xml

You just need ONLY ONE time accept this path and you will not see popup window.
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LVL 63

Expert Comment

by:Simon Butler (Sembee)
ID: 39709643
Where does it say there is a hosted Exchange provider involved?
This happens with sites that do not host Exchange because it is a feature of CPANEL.

Simon.
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LVL 5

Expert Comment

by:Pavel Nagaev
ID: 39710536
It isn't a feature of CPANEL it is a feature of Outlook. I mean "hosted" that other organizations using this Exchange, but not "hosted Exchange".

Here it the more technical details http://support.microsoft.com/kb/956528
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Accepted Solution

by:
ttotus earned 0 total points
ID: 39714998
I've since learned the following:

The issue does not occur when the remote worker is on any other network other than their home network. They were also unable to access any https sites at all when on their home wifi. The employee has reset their router and now email, and secure sites are working properly again. Very, very strange.
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Author Closing Comment

by:ttotus
ID: 39846834
This is the solution that worked
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