Which of these is a feature of Okta-Mastered people?

Okta-Mastered people have the capability to change their passwords through the Settings window. This feature is essential for user self-service and enhances security by allowing users to maintain control over their own credentials, thus minimizing the administrative overhead on IT teams for password resets. Leveraging such self-service capabilities is a key benefit in identity and access management systems, as it empowers users while maintaining security protocols.

While the other choices may sound plausible, they do not accurately reflect the characteristics specific to Okta-Mastered people. For instance, the ability to be added to external groups or authenticate against an external password policy is more about integration and federation capabilities, rather than features inherent to being Okta-Mastered. Similarly, the concept of having unlimited attributes associated with accounts is not a definitive feature related to Okta-Mastered accounts, as there are usually constraints on the number and types of attributes that can be associated with any user account.