Why is a service greyed out and not available for selection in the Add Roles and Features Wizard?

When a service is greyed out and not available for selection in the Add Roles and Features Wizard, it typically indicates that the service is already installed on the server. This prevents the installation process from attempting to install the same service multiple times, which could cause conflicts or redundancy. The wizard is designed to streamline the deployment of roles and features, so it automatically restricts the selection of services that are confirmed to be present on the system.

In this context, the other factors mentioned – such as network connectivity, user permissions, and compatibility – would generally manifest through different types of alerts or notifications rather than the service being greyed out. If the server were not connected to the network, it might limit available roles but wouldn't directly grey out installed ones. Similarly, lacking the necessary permissions would typically prevent access to the wizard altogether or result in an error, rather than merely grey out options. Compatibility issues could lead to the inability to install the service, but they would not typically display an installed status.

Thus, understanding that the service is already installed provides clarity on why it is unavailable for selection in this specific scenario.