Description

Ensure that the number of days before users are asked to re-confirm their authentication information is not set to 0.

Rationale

This setting is necessary if you have setup 'Require users to register when signing in option'. If authentication re-confirmation is disabled, registered users will never be prompted to re-confirm their existing authentication information. If the authentication information for a user changes, such as a phone number or email, then the password reset information for that user reverts to the previously registered authentication information.

Impact

Users will be prompted for their multifactor authentication at the duration set here.

Audit

From Azure Portal

1. From Azure Home select the Portal Menu.
2. Select Microsoft Entra ID.
3. Under Manage, select Users.
4. Under Manage, select Password reset.
5. Under Manage, select Registration.
6. Ensure that Number of days before users are asked to re-confirm their authentication information is not set to 0.

Default Value

By default, the Number of days before users are asked to re-confirm their authentication information is set to 180 days.

References

1. https://docs.microsoft.com/en-us/azure/active-directory/active-directory-passwords-how-it-works#registration
2. https://docs.microsoft.com/en-us/azure/active-directory/authentication/howto-sspr-deployment
3. https://learn.microsoft.com/en-us/security/benchmark/azure/mcsb-governance-strategy#gs-6-define-and-implement-identity-and-privileged-access-strategy
4. https://docs.microsoft.com/en-us/azure/active-directory/authentication/concept-authentication-methods