Understand: Concealed display names

By default, Microsoft conceals user display names in all usage reports. As a result, individual users will appear anonymously, similar to what is displayed in the ACBE portal’s usage reports.

This anonymization is a standard privacy feature, ensuring that sensitive user information is not exposed in aggregated reporting.

If your organization requires user names to be visible in reports, this setting can be adjusted. For detailed instructions, please follow Microsoft’s official guidance here:
https://learn.microsoft.com/en-us/troubleshoot/microsoft-365/admin/miscellaneous/reports-show-anonymous-user-name