Authentication Method Using a Phone Number.

Q. Please explain the steps for phone number-based authentication when signing in to Microsoft 365 Copilot.

A. Please authenticate using the steps below. 

*From January 2025, the name "Microsoft 365" was changed to "Microsoft 365 Copilot".

*If a phone number is not registered as an authentication method, authentication via phone number cannot be performed.

1. Enter the THERS account and password on the Microsoft sign-in form.
    
2. On the screen prompting for multi-factor authentication after input, click "I can't use my Microsoft Authenticator app right now".
   
    
3. If other authentication methods are available, please select either "Text" or "Call".
4. If "Text" is selected, enter the authentication code received via SMS to sign in to Microsoft 365 Copilot.
5. If "Call" is selected, an automated voice call will be made. Follow the voice instructions to complete the sign-in.