How can Cortex XSOAR save time when a phishing incident occurs?

Cortex XSOAR is designed to streamline security operations and incident response processes, particularly during phishing incidents. The first choice highlights the automation capability of the platform, where it can quickly identify and catalog all mailboxes that have received a phishing email by creating cases for each instance. This is crucial because handling phishing incidents manually can be time-consuming and prone to human error. By automating this task, Cortex XSOAR enhances the incident response speed significantly. The rapid identification of affected users allows security teams to focus on containment and remediation efforts promptly, hence saving time and reducing the overall impact of the phishing attack.

The other options, while they may seem useful, do not directly address the efficiency of case management in response to the phishing attack. For instance, sending an email to warn staff can be beneficial but does not address the need for triaging and prioritizing cases. Purging emails might help in mitigating the risk, but it could also lead to loss of evidence or legitimate communications. Responding to the phishing email to unsubscribe is typically an ineffective strategy and may even exacerbate the situation by confirming the email address to the attacker. Therefore, option A stands out as the most effective way Cortex XSOAR saves time in managing phishing incidents.