Autodiscover Error: allow this website to configure server settings

Few days ago my customer told me there is an error message shows up when user open their Outlook client :  allow this website to configure server settings.

When I take a look into the Exchange server, I found the internal Autodiscover URL from one of the CAS servers has been modified.

                                             The first CAS server internal Autodiscover doesn't
                                             match with second CAS Autodiscover URL

Below is the command to reset the Autodiscover internal URL:

Set-ClientAccessServer -Idendity "server name" -AutodiscoverServiceInternalUri "https://test.abc.net/autodiscover/autodiscover.xml"


When I corrected the internal URL, user is now able to launch their Outlook without seeing this error anymore.