Main Settings / General Settings / Security Settings / Basic Settings / Enable 2-Factor Authentication for the following actions
When the setting is enabled for consents, each time the user will be required to consent to the change, the authentication of two factors will be displayed.
You must have selected the type of message receipt in Main Settings / General Settings / Security Settings / Basic Settings / Message type for 2-Factor Authentication.
Setting -> Active for Consents
The user received an email with the PIN code as shown below 
