pki

Microsoft’s history with Windows updates has often been punctuated by instances where critical security patches—introduced to defend against real-world threats—have triggered unexpected issues in enterprise environments. The April 2025 Patch Tuesday release is one such event, and its fallout has...

The recent April Patch Tuesday updates have brought an unexpected challenge for enterprise administrators and IT security professionals: broken Kerberos authentication for Windows Hello and certificate-based logins on Active Directory Domain Controllers (DC) running supported versions of Windows...

Over the past several years, Windows Hello for Business (WHfB) has emerged as a cornerstone of Microsoft’s modern authentication approach, prioritizing both convenience and layered security. However, recent developments have drawn fresh scrutiny to the ecosystem’s dependence on complex trust...

In today's interconnected world, where safeguarding digital assets and maintaining trust are paramount, the marriage of DigiCert ONE and Microsoft Azure couldn't come at a better time. DigiCert, a titan in the domain of digital trust and public key infrastructure (PKI), has strategically aligned...

Revision Note: V1.2 (September 5, 2012): Corrected the common name for the "CN=Microsoft Online Svcs BPOS APAC CA4" certificate issued by Microsoft Services PCA. Summary: Microsoft is aware of Microsoft certificate authorities that are outside our recommended secure storage practices. Upon a...

It was just over one year ago, May 28, 2012, to be exact, that I transitioned from running active MSRC cases and writing bulletins to my current role managing software security incidents. A lot has changed in that year - and I’ve dealt with some interesting issues during my tenure - but...

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Troubleshoot Windows Directory PKI and ADCS issues by using this diagnostic service from Microsoft. This troubleshooter is integrated with the Microsoft Fix It Center Pro service. This service can perform automated diagnostic analysis to identify... Link Removed

Hello there. As we prepare for September’s two security updates, we’d like to remind you about an important change to Windows’ certificate requirements included in Security Advisory 2661254 (Update For Minimum Certificate Key Length). In June, we began communicating this...

Before we dive into the July security updates, let’s change up the normal order and take a look at the two Security Advisories we are releasing today. One takes an exciting step into the future, while the other prepares us to take an equally important step away from the past. Security...

Revision Note: V1.0 (July 10, 2012): Advisory published. Summary: Microsoft is aware of Microsoft certificate authorities that are outside our recommended secure storage practices. Upon a routine review, we are placing these certificates in the Untrusted Certificate Store, and...