You can download and launch the Microsoft Authenticator app at www.aka.ms/mfasetup login. Since passwords are simple to forget or steal and can be used against you, using this software to set up two-factor authentication gives you a safer way to sign in. Your phone is more secure thanks to two-factor authentication, and it's more difficult for thieves, everyday users, and hackers to access your account. The Microsoft Authenticator app has many uses that you can choose from.