When installing Talend Data Authoring for MDM, the configuration properties are stored in a conf folder at <$INSTALLDIR>/mdm/apache-tomcat/conf (<$INSTALLDIR> indicates the path where the MDM server has been installed).
This folder has application-specific configuration files which allow you to reconfigure the web application according to your installation environment.
This document goes in detail to explain the properties present in data-authoring-proxy.properties and data-authoring-gateway.properties, the basic configuration files for Talend Data Authoring for MDM.