Which type of audit event is best for determining attempts to access non-Active Directory objects?

The correct choice is focused on the category of "Object access" because this type of audit event specifically tracks interactions with objects—files, folders, shares, or any other resources managed by the system outside of Active Directory. Object access auditing is essential in environments where data protection and monitoring are critical, as it provides detailed logs of who accessed what data and when.

With object access auditing enabled, administrators can see attempts to read, write, or modify files and resources, thus allowing them to identify unauthorized access or suspicious behavior around sensitive data. This is particularly important in compliance scenarios, where tracking all access to specific data is a requirement.

In contrast, other types of audit events serve different purposes. For example, user login events primarily capture authentication attempts within Active Directory, thus focusing on user identity rather than their interaction with individual objects. Network access events might show attempts to connect to the network or specific services but do not detail interactions with data and files. Lastly, administrative actions log changes made by users with elevated privileges, which is valuable but does not effectively capture normal user access patterns to data. Each of these options has its significance, but for the specific goal of monitoring access to non-Active Directory objects, object access is the most relevant choice.