Troubleshooting Certificate Services in Windows Server: Logs, CA Errors & Certificate Validation - SkillPoint IT | Free IT Training & Managed Services Forum

Confirming the Validity of a Certificate

mianshahzad10 — Tue, 22 Jul 2025 07:06:35 +0000

Steps to Validate a Certificate:

Open certificate in MMC → Details tab
Check:
- Issuer matches the correct CA
- Validity period is current
- Signature algorithm is valid (not SHA1)
Click Certification Path tab:
- Ensure there are no red Xs in the chain
Check Revocation Status:
- Ensure CRL or OCSP is reachable and up to date
- Use:

certutil -verify certificate.cer

ip: Use certutil -urlfetch -verify to test both OCSP and CRL connections.

mianshahzad10 — Tue, 22 Jul 2025 07:05:44 +0000

Common Issues:

Issue	Fix
CA service won't start	Check permission on CA private key & Event Viewer logs
Certificate requests failing	Ensure proper templates are published and auto-enrollment is on
CRL not publishing	Verify file share/URL for CRL distribution point (CDP)
Expired CA certificate	Renew CA certificate using `certutil` or MMC

mianshahzad10 — Tue, 22 Jul 2025 07:05:17 +0000

Enable Diagnostics Logging for AD CS:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\CertSvc\Configuration

This enables verbose logging for deeper insights into failures.

mianshahzad10 — Tue, 22 Jul 2025 07:04:29 +0000

Where to Look:

Event Viewer → Applications and Services Logs → Microsoft → Windows → CertificateServicesClient / CertificationAuthority
System logs for service start/stop errors
Security logs for failed certificate requests or access issues

🔎 Common Events to Watch:

Event ID	Description
53	Certificate request submitted
70	Certificate issued successfully
100	Revocation or CRL publication issue
101	Enrollment request failed