Supported authentication protocols

AAD supports several authentication methods. Here’s the complete list at the time of writing:

• Header-based authentication: This authentication pattern, which involves forwarding HTTP headers from a client application to a destination web application, is supported only when using the AAD Application Proxy service. AAD Application Proxy is a service that comprises two distinct components, one of which runs in the cloud and one of which runs on-premises (through the means of a connector), that allows us to publish on-premises applications that still leverage legacy authentication protocols to the internet.
• LDAP authentication: Support for LDAP authentication is provided only through AD DS, which is a component, briefly described in the previous chapter, that must be deployed within an Azure Virtual Network and leverages identities that come from the synchronization of on-premises Active Directory forests. AD DS is useful in specific...