---
title: "Office landline | (authentication via Microsoft call)"
description: "È possibile utilizzare il telefono fisso d’ufficio come metodo alternativo di autenticazione a due fattori (2FA) per l’accesso ai servizi Microsoft 365 dell’Università di Pisa.\nIn questo caso, durante la procedura di accesso, Microsoft effettua una chiamata automatica al numero di telefono configurato: per completare l’autenticazione è sufficiente rispondere e premere il tasto “#” (cancelletto) sul dispositivo telefonico."
url: "https://it.unipi.it/en/configurazioni/multi-factor-authentication/office-landline-authentication-via-microsoft-call/"
updated: "2026-05-13"
category: "Security and Privacy / Multi-Factor Authentication | MFA"
---

# Office landline | (authentication via Microsoft call)

You can use the **office landline** as an alternative method for two-factor authentication (2FA) to access the **Microsoft 365** services of the University of Pisa.
In this case, during the login procedure, **Microsoft makes an automatic call** to the configured phone number: to complete the authentication, simply answer and **press the “#” (hash) key** on the phone device.

This method is useful for those who do not have a smartphone or cannot use mobile authentication apps.

1. Access the **Personal Account** section of Office 365 at the address: [https://myaccount.microsoft.com/](https://myaccount.microsoft.com/) (if prompted, proceed with authentication using university credentials).
2. In the **Security Information** panel (highlighted in red in the image), click on **Update information**.
   ![](https://it.unipi.it/wp-content/uploads/2025/10/tofu-03.png)
3. Select the option **Office Phone**.
   ![](https://it.unipi.it/wp-content/uploads/2025/10/telefono-01.png)
4. In the following window, enter the Italian *country code* (**+39**) and in the **Phone number** field, enter the office phone number. Then click on **Next**.
   ![](https://it.unipi.it/wp-content/uploads/2025/10/telefono-02.png)
5. The activation procedure for the second factor concludes with a call from Microsoft to your phone number, which will ask you to press the pound key (**#**) on your phone. (Note: on Alcatel models, you must first press the ***** asterisk button before dialing **#**). Once the pound key is pressed, the procedure for activating the new authentication method is complete.
   ![](https://it.unipi.it/wp-content/uploads/2025/10/telefono-03.png)

## **Access to services with phone authentication**

> 1. To access services protected by authentication via landline, when the request window appears, select **Make a call to the associated number**.
>    ![](https://it.unipi.it/wp-content/uploads/2025/10/telefono-04.png)
> 2. A notification window will appear indicating the need to answer the call from **Microsoft** on the associated office phone.
>    After answering, to complete the authentication and access the portal protected by 2FA, press the **pound (#)** key on your physical or virtual phone.
>    ![](https://it.unipi.it/wp-content/uploads/2025/10/telefono-05.png)

## Access Issues

For any access issues or support with using two-factor authentication (2FA), you can contact the [relevant IT center](https://it.unipi.it/en/it-help-en/).