====== 5.4 Common Problems ======

Solutions for typical certificate issues.

===== "No Certificate Found" =====

**Cause:** Certificate not installed or expired.

**Solution:**
  - Check certificate in certificate store
  - Check validity (expiration date)
  - If expired: Request new certificate from IT

===== "Connection Refused" =====

**Cause:** Server does not accept your certificate.

**Solution:**
  - Contact IT department
  - Certificate may have been revoked
  - Request new certificate

===== "Certificate Not Trusted" =====

**Cause:** Company CA not installed on your PC.

**Solution:**
  - Contact IT helpdesk
  - Root certificate must be installed

===== Renew Certificate =====

Before expiration (about 4 weeks in advance):
  - Request new certificate from IT
  - Old certificate remains valid until expiration
  - Install new certificate
  - Test connections