In which app can you authenticate employees and download a .CSV file of users?

The correct choice relates to the functionality of the "Maintain business users" app, which is specifically designed for managing user accounts, including the capability to authenticate employees and facilitate actions such as downloading a .CSV file of user data. This app enables administrators to efficiently handle user access and roles within the system, making it a crucial tool for maintaining accurate and up-to-date user information.

In contrast, other options do not focus specifically on the management and authentication of business users in the same manner. The "Access control manager" is more concerned with defining and managing access rights rather than directly handling user accounts or exporting data. "User management settings" typically pertains to adjusting various configurations for user accounts but does not provide a straightforward way to download user lists in .CSV format. The "Identity verification tool" is aimed at validating user identities rather than managing or downloading user account details.

Thus, the "Maintain business users" app stands out as the appropriate selection for those specific tasks.