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All of the following components are required for your first ESA installation:

At least one instance of the Authentication Server

At least one of the authentication endpoints (API, Windows Login, Web Application, AD FS, Remote Desktop, or RADIUS)

You can install all components on a single machine or across multiple machines in a distributed environment—however, the ESA Web Console is part of the Authentication Server. As is the case with distributed systems, there are many possible installation scenarios.

When installing ESA Authentication Server in an Active Directory environment, you do not have to install it on the domain controller specifically. It can be installed on any other machine, even in Standalone mode.

The example below illustrates a generic installation scenario in an Active Directory environment; however, this example can serve as a basic guide for other deployment scenarios. The example installation consists of two sequences—after completing both, your deployment will correspond with the figure below.