22.214.171.124 Locations Found by an HTTP Redirect
An Autodiscover client can also issue an HTTP GET method with the URI set to "http://Autodiscover.<domain>/Autodiscover/Autodiscover.xml".
The RequestUri element can be processed as specified in [RFC2616] section 9.3. If the response is a 302 redirection (as specified in [RFC2616] section 10.3.3), the Autodiscover client uses the value of the redirection URL. Note that if the response is not a 302 redirection, then the expected response is an Autodiscover server URI.
If this URI results in an HTTP 302 redirect, prompt the user to warn them of the redirection. If the user accepts, the new location is added to the list of possible Autodiscover server URIs.