Cis Azure Foundations 5.9

Ensure 'Number of days before users are asked to re-confirm their authentication information' is not set to '0'

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 'Require users to register when signing in' is enabled. 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 to re-confirm their authentication information after the number of days specified.

Audit Procedure

Using Azure Portal

1. From Azure Home select the Portal Menu.
2. Select Microsoft Entra ID.
3. Under Manage, select Users.
4. 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.

Expected Result

Number of days before users are asked to re-confirm their authentication information should not be 0. A value such as 180 days is recommended.

Remediation

Using Azure Portal

1. From Azure Home select the Portal Menu.
2. Select Microsoft Entra ID.
3. Under Manage, select Users.
4. Select Password reset.
5. Under Manage, select Registration.
6. Set the Number of days before users are asked to re-confirm their authentication information to your organization-defined frequency.
7. Click Save.

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://learn.microsoft.com/en-us/entra/identity/authentication/concept-sspr-howitworks#registration
2. https://support.microsoft.com/en-us/account-billing/reset-your-work-or-school-password-using-security-info-23dde81f-08bb-4776-ba72-e6b72b9dda9e
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://learn.microsoft.com/en-us/entra/identity/authentication/concept-authentication-methods

CIS Controls

Profile

Level 1 | Manual