You are configuring Multi-Factor Authentication (MFA) for your company's Azure Active Directory (AD) tenant.
You need to allow users to receive a verification notification on their phones when they attempt to log in to Azure.
What should you do?
You should have the users download Microsoft Authenticator. This app allows users to receive notifications on their phones when they log in to Azure.
You should not have the users download Azure. This app allows IT administrators to manage resources from their mobile devices.
You should not create a Notification Hub. This resource allows you to send custom notifications from applications to mobile devices. Azure allows you to send login notifications by using MFA and Microsoft Authenticator.
You should not create a Service Bus Relay. This resource allows you to send messages from Azure to on-premises web services.