Regular scanning of documents updates the search index on a regular basis. You can schedule scanning of documents at a weekly, daily, or hourly basis. With every scheduled scanning, the RoboHelp server reads all the published projects. The server recreates indexes only if you have set the re-index property in the server.properties file to true. By default, the re-index property is set to true. The search setting pane is not visible if the re-index property is set to false. The indexing takes place only at scheduled intervals of rescanning and when a project is published on a server.