A developer receives an error when trying to register an app in the tenant. What tenant setting should you change so the developer can register the app?

The correct answer is Modify the User settings. In Azure Active Directory, the "User settings" blade contains an option titled "App registrations" which controls whether users can register applications. By default, this is often set to "Yes", allowing users to register applications. If a developer is receiving an error, it's likely this setting has been changed to "No" or a more restrictive option. Changing it back to "Yes" or a more permissive setting will resolve the issue. Modifying Directory properties is incorrect because this area deals with general tenant information like country/region, not app registration permissions. Setting Enable Security defaults to Yes is incorrect as security defaults enforce baseline security policies, not app registration permissions. Configuring Consent and permissions settings for enterprise applications is incorrect because this manages how users consent to apps accessing data and the permissions those apps have, not the ability to register new applications.