I have been working on making AutoDiscover work all day in my new Exchange 2013 Deployment. I ran Microsoft's Exchange Server tool and it keeps feeding this error back to me: ExRCA is attempting to retrieve an XML Autodiscover response from URL https://autodiscover.<domain>.net/AutoDiscover/AutoDiscover.xml for user user@<domain>.net. ExRCA failed to obtain an Autodiscover XML response. Additional Details None of the expected XML elements were found in the XML response. I would really appreciate any help that you can provide on this.

EXRCA is trying to retrieve the XML configuration file, yet it can't. This XML is served trough the Autodiscover virtual diractory on your front-end servers (CAS servers). You should check if the autodiscover url's are configured correctly and pointing to the correct CAS server. Exchange Autodiscovery uses following procedure to try and discover the autodiscover XML: Note: You must provide a host service (SRV) resource record in DNS for Outlook clients to discover the Autodiscover service using DNS. For more information, see your Windows documentation for configuring DNS and also see the White Paper: Exchange 2007 Autodiscover Service. Depending on whether you've configured the Autodiscover service on a separate site, the Autodiscover service URL will be either https://<smtp-address-domain>/autodiscover/autodiscover.xml or https://autodiscover.<smtp-address-domain>/autodiscover/autodiscover.xml, where ://<smtp-address-domain> is the primary SMTP domain address. For example, if the user's e-mail address is tony@contoso.com, the primary SMTP domain address is contoso.com. The following figure shows a simple topology with a client connecting from the Internet. http://technet.microsoft.com/en-us/library/bb124251.aspx Answers provided are coming from personal experience, and come with no warranty of success. I as everybody else do make mistakes.

The autodiscover service url <a href="https://autodiscover..net/AutoDiscover/AutoDiscover.xml">https://autodiscover.<domain>.net/AutoDiscover/AutoDiscover.xml could not be accessed. You should check the NDS settings and IE proxy configuration to make sure it canbe resolved.Fiona Liao TechNet Community Support

The autodiscover service url <a href="https://autodiscover..net/AutoDiscover/AutoDiscover.xml">https://autodiscover.<domain>.net/AutoDiscover/AutoDiscover.xml could not be accessed. You should check the NDS settings and IE proxy configuration to make sure it canbe resolved.Fiona Liao TechNet Community Support