Duo uses push notifications, time-based, one-time passwords, physical tokens and biometrics to verify the identity of users at login. Similarly, Microsoft Authenticator uses push notifications, one-time passcodes, and biometrics for authentication and can integrate with Microsoft 365 and Azure Active Directory. While both 2FA options share some similarities, there are still key differences that can sway your decision to choose one over the other.
Currently Okta + Okta Verify. In a previous job where we were all-in on Microsoft, we used Authenticator but were starting to implement Duo because of it’s wide reach and ease of setup. Like someone else said, Duo was able to do MFA for RDP at the time when Authenticator couldn’t.