1. Stop the AGS service under Windows2. Open <a href="file:C:/Program" target="_blank">C:\Program</a> Files\ArcGIS\Server\framework\etc\hostname.properties and take note of hostname variable which should match the Private IP of the AWS instance.3. Open <a href="file:C:/Program" target="_blank">C:\Program</a> Files\ArcGIS\Server\framework\etc\machine-config.xml and update the <MachineName> tag to reflect the Private IP address of the instance and then save it.4. Open <a href="file:C:/arcgisserver/config-store/machines" target="_blank">C:\arcgisserver\config-store\machines</a> and change the name of the LOCALHOST folder to the 10.0.2.143.5. Open <a href="file:C:/arcgisserver/config-store/machines" target="_blank">C:\arcgisserver\config-store\machines</a> and change the name of LOCALHOST.json to 10.0.2.143.json6. Open <a href="file:C:/arcgisserver/config-store/machines/10.0.2.143.json" target="_blank">C:\arcgisserver\config-store\machines\10.0.2.143.json</a> and update the machineName variable to reflect the private IP.7. Open <a href="file:C:/arcgisserver/config-store/clusters/default.json" target="_blank">C:\arcgisserver\config-store\clusters\default.json</a> and update the json to reflect... {"clusterName":"default","clusterProtocol":{"type":"TCP","tcpClusterPort":4004},"configuredState":"STARTED","machineNames":["10.0.2.143"]}8. Open <a href="file:C:/arcgisserver/config-store/clusters/default" target="_blank">C:\arcgisserver\config-store\clusters\default</a> and update LOCALHOST.dat to 10.0.2.143.dat9. Open <a href="file:C:/arcgisserver/config-store/clusters/default/10.0.2.143.dat" target="_blank">C:\arcgisserver\config-store\clusters\default\10.0.2.143.dat</a> and replace LOCALHOST with 10.0.2.14310. Restart the AGS service and you should now be able to continue through the upgrade process successfully.