Need help in setting up MS Authenticator app

https://support.microsoft.com/en-us/office/set-up-your-microsoft-365-sign-in-for-multi-factor-authentication-ace1d096-61e5-449b-a875-58eb3d74de14

Would this be what your looking for. This applies for Work and School accounts. If setup fails or you’ve changed devices, your admin may need to reset your MFA methods so you can re‑register the app.