3.1.5.3 Autodiscover Redirect

If the server returns an Autodiscover response (as specified in section 2.2.4) which contains an Action element (section 2.2.4.1.1.2.2) with a value of "redirectAddr", the client SHOULD send a new Autodiscover request. The value of the EMailAddress element (section 2.2.3.1.1.2) in the new request SHOULD be set to the value of the RedirectAddr element (section 2.2.4.1.1.2.8) in the Autodiscover response.

If the server returns an Autodiscover response which contains an Action element with a value of "redirectUrl", the client SHOULD send a new Autodiscover request to the URL contained in the value of the RedirectUrl element (section 2.2.4.1.1.2.9) in the Autodiscover response.

See section 4.2 for an example of an Autodiscover Redirect response.