Application Proxy is an Azure AD feature that enables users to access on-premises web applications from a remote client. It includes both the cloud-based Application Proxy service and the on-premises Application Proxy connector. Azure AD, the Application Proxy service, and the Application Proxy connector work together to securely pass the user sign-on token from Azure AD to the web application.
Application Proxy is recommended for providing remote users with access to internal resources. It replaces the need for a VPN or reverse proxy. It is not intended for internal users on the corporate network; using Application Proxy unnecessarily can introduce unexpected and undesirable performance issues.
A local node with AIS-proxy and a local node with a path-based routing proxy can be used in combination with the Azure AD Application Proxy.
Domains of the services: