What report elements can potentially change due to a firmware upgrade?

The correct choice highlights that custom datasets can change due to a firmware upgrade. When a firmware update occurs, it can introduce new functionalities, alter existing features, or modify how data is collected and reported within FortiAnalyzer. Custom datasets, which are tailored to specific reporting needs, can be affected by these alterations, as new data types or formats might be added, or the way the system processes existing data can change.

Consequently, if there are updates to the underlying data architecture or improvements in reporting capabilities with the new firmware, it is possible that custom datasets may need to be revised or recreated to align with the new system behavior. Maintaining the integrity and relevance of these datasets is crucial for accurate reporting and analytics.

In contrast, while report templates, user permissions, and server settings are critical components of the system's operation, they are generally more stable and less likely to be directly impacted by firmware updates compared to custom datasets. These components may still require review and adjustment after an upgrade, but they typically do not inherently change due to the firmware itself.