What file should the custom content of the installation be put into?

The custom content of the installation in SailPoint IdentityIQ should be placed into the SSB, which stands for the "SailPoint Solution Bundle." This is a dedicated container designed for incorporating custom code, configurations, and other content that extends or modifies the standard functionality of IdentityIQ.

Using SSB helps maintain organization and ensures that the custom content is properly incorporated into the application during the deployment process. It allows for easier upgrades and management of customizations. In contrast, the other options refer to different aspects of IdentityIQ's structure, but they are not specifically intended for custom installation content. For example, iiq.zip is a compressed file that typically contains the entire IdentityIQ package, base/ga might refer to a base directory within the installation, and welcomeFile does not serve the function of housing custom installation content. Hence, employing SSB is the recommended practice for managing and deploying customizations in IdentityIQ.