A Microsoft app for iOS and Android devices that enables authentication with two-factor verification, phone sign-in, and code generation
Read on here.
If you have a paid subscription to Microsoft 365, you also have a free Azure AD subscription. You can use Azure AD to create and manage user and group accounts. To activate this subscription, you have to complete a one-time registration. Afterward, you can access Azure AD from your Microsoft 365 admin center.
https://learn.microsoft.com/en-us/microsoft-365/enterprise/azure-integration?view=o365-worldwide#azure-ad-editions-and-microsoft-365-identity-management
--please don't forget to upvote and Accept as answer if the reply is helpful--