Two-factor authentication adds a layer of security to your account by using One Time Password (OTP) as a second factor. Two-factor authentication is an optional feature, which is disabled by default.

When two-factor authentication is enabled, after your first login, you are prompted to set up the mobile authenticator to activate your account. On future logins, you must enter the OTP code to access Device Enrollment Services. A mobile device is required only for OTP authentication. You must use a computer to access the Device Enrollment Services interface.