You must complete the following tasks before using the IIS Authentication plug-in for multi-factor authentication on the Microsoft Internet Information Services (IIS) server:
Change identity for an application pool, see Modifying Identity for an Application Pool.
Configure Windows authentication for RDWeb, see Enabling Windows Authentication for RDWeb.
Configure Windows authentication for OWA, see Enabling Windows Authentication for Outlook Web Access.
Create an OAuth 2.0 event, see Configuring the Advanced Authentication Server.