What action should you take to ensure the default Fusion rule in Azure Sentinel generates alerts?

To ensure that the default Fusion rule in Azure Sentinel generates alerts, adding data connectors is the correct action. Azure Sentinel relies on data from various sources to identify potential threats and generate alerts. Data connectors allow Azure Sentinel to ingest data from different sources, such as Azure services, on-premises systems, and third-party applications. Without the necessary data flowing into Sentinel through these connectors, the Fusion rule would have no information to analyze, thus failing to generate any alerts.

Activating the proper data connectors ensures that the data needed for detection rules, including Fusion rules, is available. Each data connector is designed to work with specific types of data or logs, correlating them to find patterns or anomalies indicative of security issues. Therefore, establishing the right data flow is crucial for the effectiveness of threat detection within Azure Sentinel.