If you agree, select I accept the terms in the license agreement and click Next. Select the appropriate language from the Language drop-down menu before proceeding. Select Remote Administrator Server and click Next. Download the ESET Remote Administrator Server installer file. You can read a full Knowledgebase article on this topic here: Steps: 1.
This video demonstrates how to use the All-in-one installer to install and configure ESET Remote Administrator Server (ERA Server). ESET Remote Administrator Server 5.X.X & 4.X.X ESET NOD32 Antivirus System.