---
title: "2fast – Two Factor Authenticator (TOTP) | Windows"
description: "L’applicazione 2fast – Two Factor Authenticator (TOTP) consente di generare codici temporanei di verifica per l’autenticazione a più fattori (MFA) ai servizi Microsoft 365 dell’Università di Pisa.\nPuò essere installata su computer Windows come alternativa alle app di autenticazione per smartphone (Microsoft Authenticator o Google Authenticator), offrendo una soluzione utile in caso di indisponibilità del dispositivo mobile."
url: "https://it.unipi.it/en/configurazioni/multi-factor-authentication/2fast-two-factor-authenticator-totp-windows-2/"
updated: "2026-05-13"
category: "Security and Privacy / Multi-Factor Authentication | MFA"
---

# 2fast – Two Factor Authenticator (TOTP) | Windows

> The **2fast – Two Factor Authenticator (TOTP)** application allows generating **temporary verification codes** for multi-factor authentication (MFA) to access the **Microsoft 365** services of the University of Pisa.
> It can be installed on **Windows** computers as an alternative to authentication apps for smartphones (*Microsoft Authenticator* or *Google Authenticator*), providing a useful solution in case the mobile device is unavailable.
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> ## Installation and Configuration
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> The following procedure describes how to install and configure 2fast on your Windows PC to generate the TOTP codes necessary for secure access to Microsoft services.
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> *Note:* for security reasons, the 2fast app does not allow the capture of screenshots during certain installation phases. The instructions are therefore primarily presented in text format.
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> 1. From Windows, connect to the **Microsoft Store** and search for **2fast**.
>    ![](https://it.unipi.it/wp-content/uploads/2025/10/2fast-01.png)
> 2. On the application page for **2fast – Two Factor Authenticator**, click on **Get**.
> 3. After a brief wait for the download and installation of the application, press **Open** and on the next screen, the button **Skip**.
> 4. Then choose **Create a new data file (first launch)** and on the next screen, select **Choose local path** to create the file locally that will contain, in an encrypted form, the accounts stored and used by the app.
> 5. Then select the storage path for the data file on your PC: choose the folder where you want to save the file, for example **Documents**, and click on **Select folder**.
> 6. In the next window (**New data file**), write the name of the file where the data will be saved (example: 2fast-data), choose and enter the protection password (to be repeated twice for confirmation) and finally click on **Create a data file**. The chosen password will be the one required for access to the *2fast* app.
> 7. On the next page (**Accounts**), click the **+ Add account** button to create a new account. In the tab that opens (**Entry type**), select the mode for importing the secret key (private key). Choose the **Manual entry** option.
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>    Before completing the installation of *2fast Authenticator*, some preliminary steps on Office 365 need to be taken:
> 8. Go to the “personal account” section of Office 365 at the address: [https://myaccount.microsoft.com/](https://myaccount.microsoft.com/) (if prompted, proceed with the usual authentication).
> 9. In the **Security information** panel (highlighted in red in the image), click **Update your information**.
>    ![](https://it.unipi.it/wp-content/uploads/2025/10/2fast-02.png)
> 10. Select ***+* Add sign-in method**. Choose **Microsoft Authenticator** and then click the link **I want to use a different authentication app**.
> 11. In the **Set up your account** window, press **Next** and then click on **Can't scan the image?**
>     ![](https://it.unipi.it/wp-content/uploads/2025/11/2fast-03-300x278-1.png)
> 12. To connect Office 365 and *2fast authenticator*, you need to enter the strings related to “**Account Name**” and “**Private Key**” provided in the window shown in figure 4 (the strings are obscured by gray rectangles) into two specific fields in the *2fast* app.
>     ![](https://it.unipi.it/wp-content/uploads/2025/11/2fast-04.png)
> 13. Returning to the *2fast* app, copy the string **Account Name** into the **Label** field and the string **Private Key** into the **secret key** field, enter your email where indicated, and then press **Create an account**. To avoid errors, it is suggested to copy the strings **Account Name** and **Private Key** using the designated **copy** icons highlighted with the numbers 1 and 2 in red (image point 12). At this point, the new account/link just created will be available in the 2fast app.
> 14. To complete the procedure on Office365, you finally need to press the **Next** button in the window shown in the image of point 12, and in the window that appears next, enter the six-digit code displayed in the *2fast* app (a code that renews every 30 seconds). By pressing **next** again, the procedure for activating the second factor of authentication is completed.
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> To access a site protected with MFA via the 2fast app, simply open the app and, for the specific authentication profile, enter the 6-digit code when prompted by the portal you wish to access.
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> ## Access Issues
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> For any access issues or support with using two-factor authentication (2FA), you can contact the [relevant IT support center](https://it.unipi.it/en/it-help-en/).