If a security administrator does not receive email alerts for certain activities in Microsoft Defender, what should they configure?

The correct choice focuses on configuring the severity level of email notifications, which directly impacts the alerts that a security administrator receives. In Microsoft Defender, email notifications are often set to trigger based on the severity of the threats detected. If certain activities are overlooked or not generating alerts,it's likely that their severity level is set too low or not configured to notify the administrator.

By adjusting the severity level, the security administrator can ensure that they receive alerts for a broader range of activities, particularly those considered critical or high priority. This adjustment allows for timely responses to potential threats, improving the overall security posture of the organization.

Alternatives such as integration settings for threat detection and Azure Defender plans pertain more to the broader configuration of security measures rather than directly influencing the alert system. Cloud connectors could relate to linking external data sources or services, which doesn’t address the issue of missing email notifications specifically. Thus, adjusting the severity level is the most relevant and effective approach for ensuring that the administrator receives timely alerts regarding critical activities within Microsoft Defender.