Единственное что нашел в статьях это: Client applications use the Autodiscover service when the application starts for the first time. For example when an Exchange Web Services (EWS) application starts for the first time, the application configures itself using the Autodiscover service. For a user's computer joined to the
contoso.com domain and in the Longview regional Active Directory site, the application generates the list of these Autodiscover service endpoints: