What is MFA (Multi-Factor Authentication) and Why Activate It #
Multi-Factor Authentication is a process that relies on the combined use of two or more identity verification methods, each belonging to different categories, which are required individually to allow access to IT resources or services. Its use is mandatory according to Article 24 of Legislative Decree 138/2024 which implements the Directive (EU) 2022/2555 (NIS 2 Directive).
To avoid being locked out of your account in case of issues with the primary two-factor authentication method (such as losing your smartphone or credentials), it is strongly recommended to immediately activate at least two different two-factor authentication methods, possibly on more than one device.
In this way, even if the primary two-factor authentication method is unavailable, you will still be able to access your account securely.
For example, in addition to the Microsoft Authenticator app, it is advisable to immediately activate…
or one or more of the following methods:
- Receiving codes via SMS on a smartphone.
- Authentication via office landline phone.
- Two-factor authentication app on PC or Mac.
Available authentication methods #
There are several procedures for activating the second factor, depending on the device and operating system in use:
On smartphone #
- Microsoft Authenticator | Smartphone (recommended method)
- Google Authenticator | Smartphone (temporary codes)
- Codes via SMS | Smartphone
On computer #
As an alternative to the smartphone – which remains the safest and recommended solution – it is possible to use a TOTP (Time-based One-Time Password) application installed on the computer as a second factor of authentication.
The Microsoft Authenticator and Google Authenticator apps are only available for mobile devices and do not have desktop versions, but there are equivalent solutions for PC and Mac that allow you to generate temporary verification codes.
- TOTP Authentication Apps on PC or Mac | temporary codes
Other Devices #
Immediate Verification and Activation of 2FA #
To verify the correct configuration or to activate 2FA immediately (recommended choice), you can refer to the dedicated guide.
After activating the second factor of authentication, it is advisable to access your email clients on all your devices to ensure their proper functioning