Microsoft Azure Authenticator

Microsoft Azure Authenticator is the official two-step verification app from Microsoft that lets you safely sign in to any service or app. To start using Microsoft Azure Authenticator, first sign in with a Microsoft email account (you can use your Hotmail, Outlook, or Skype ID). Then you can start using the two-step verification for any other service. Microsoft Azure Authenticator is a good alternative to Google's two-step verification, with a simple and user-friendly interface.