You created a custom alert rule in Azure Security Center. You need to specify which users receive email notifications when the alert triggers. What should you configure?

To specify who receives email notifications for custom alert rules in Azure Security Center, you must create an action group in Azure Monitor. Action groups define a collection of notification preferences and actions that can be triggered by Azure alerts. You can then link this action group to your Security Center alert rule. Modifying Security policy settings in Security Center primarily deals with security controls and recommendations, not alert notification recipients. Modifying members of the Security Reader role in Azure AD grants permissions to view security-related data but doesn't configure alert notifications. Modifying the alert rule itself allows you to define the alert's conditions and severity, but not the recipients of the notifications; that's handled by action groups.