Let's talk about something related to Reporting Services. You are asked to install and configure Reporting Services in one of the servers given. It is a new server, no instances of SQL Server has been installed. You are asked not to configure anything manually, install it with default configurations. You start the installation and select Reporting Services - Native in Feature Selection page and continue the wizard. You want to make sure that wizard configure your reporting services but you notice that the option Install and configure is disable.
What is the reason for this?
If you ask wizard to install files and configure reporting services for you, it needs to create two database for you. Now the issue is, it cannot find SQL Server database engine in the same instance as you are installing a new instance and you have not selected Database Engine Services in Feature Selection page. Therefor wizard cannot create database required for configuring Reporting Services. If you have already installed SQL Server with database engine services and you are updating the same instance by adding Reporting Services, or if you have selected Database engine services in the Feature Selection page, then you will see this option is enable and you can continue with the wizard.