These instructions outline the procedure for two-factor authentication using a password and a voice call, specifically for users who are operating a non-Windows computer and possess a telephone with voice-only capabilities. 

(When configuring multi-factor authentication on a second or subsequent device, you may skip the steps for "2. Enabling Multi-Factor Authentication" as the setup has already been completed. ) 

Note 1: MFA will not be activated unless you perform Step 2: "Enabling Multi-Factor Authentication" (during the period before the mandatory implementation date).

Note 2: Registering phone authentication when staying overseas (e.g., studying abroad)