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I’m thrilled to announce the public preview of advanced certificate-based authentication (CBA) options in Conditional Access, which provides the ability to allow access to specific resources based on the certificate Issuer or Policy Object Identifiers (OIDs) properties.
Our customers, particularly those in highly regulated industries and government, have expressed the need for more flexibility in their CBA configurations. Using the same certificate for all Entra ID federated applications is not always sufficient. Some resources may require access with a certificate issued by specific issuers, while other resources require access based on a specific policy OIDs.
For instance, a company like Contoso may issue three different types of multifactor certificates via Smart Cards to employees, each distinguished by properties such as Policy OID or issuer. These certificates may correspond to different levels of security clearance, such as Confidential, Secret, or Top Secret. Contoso needs to ensure that only users with the appropriate multifactor certificate can access data of the corresponding classification.
With the authentication strength capability in Conditional Access, customers can now create a custom authentication strength policy, with advanced CBA options to allow access based on certificate issuer or policy OIDs. For external users whose multifactor authentication (MFA) is trusted from partners’ Entra ID tenant, access can also be restricted based on these properties.
This adds flexibility to CBA, in addition to the recent updates we shared in December. We remain committed to enhancing phishing-resistant authentication to all our customers and helping US Gov customers meet Executive Order 14028 on Improving the Nation’s Cybersecurity.
To learn more about this new capability check authentication strength advanced options.
Thanks, and let us know what you think!
Alex Weinert
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