This article is a collection of links organized by category that should assist you when troubleshooting Active Directory Certificate Services (AD CS) issues.

Autoenrollment
Certificate Status and Revocation
Certification Authority Clustering Configuration and Troubleshooting Guide
Client–Credential Roaming
Online Responder Installation, Configuration, and Troubleshooting Guide
PKI Problems on Windows Vista

Events and Errors


Windows Server 2008 Active Directory Certificate Services
Windows Server 2008 R2 Active Directory Certificate Services

Best Practices


Best Practices Analyzer for Active Directory Certificate Services
Best Practices for Implementing a Microsoft Windows Server 2003 Public Key Infrastructure