Information
Do not allow users to remember multi-factor authentication on devices.
Rationale:
Remembering Multi-Factor Authentication (MFA) for devices and browsers allows users to have the option to bypass MFA for a set number of days after performing a successful sign-in using MFA. This can enhance usability by minimizing the number of times a user may need to perform two-step verification on the same device. However, if an account or device is compromised, remembering MFA for trusted devices may affect security. Hence, it is recommended that users not be allowed to bypass MFA.
Impact:
For every login attempt, the user will be required to perform multi-factor authentication.
NOTE: Nessus has not performed this check. Please review the benchmark to ensure target compliance.
Solution
From Azure Portal
From Azure Home select the Portal Menu
Select Azure Active Directory
Then Users
Select All Users
Click on Per-User MFA button on the top bar
Select User(s) and click on Manage user settings in the right column
Enable Restore multi-factor authentication on all remembered devices
Please note that at this point of time, there is no Azure CLI or other API commands available to programmatically conduct security configuration for this recommendation.
Default Value:
By default, Restore multi-factor authentication on all remembered devices is disabled.