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Fixing Event ID 64 CertificateServicesClient-AutoEnrollment Warnings

By hagrin - Posted on 24 July 2011

While working on one of the older SQL 2005 servers that I manage, I notice a lot of warnings in the Windows Application Event log for Event ID 64 with the CertificateServicesClient-AutoEnrollment Source. Reading the General and Details tab of the message doesn't provide many specifics about the error so I decided to write-up how you would fix this issue -

  1. On the computer generating the errors, open up the MMC by clicking the Start button and then either using the search box or Run command and typing "mmc".
  2. Click on File -> Add/Remove Snap-in, choose Certificates, click Add, choose Computer account, hit Next, leave Local Computer selected, click Finish and Click Ok.
  3. Expand Certificates and select Personal.
  4. On the Personal list of certificates, look for certificates that have just expired or that are about to expire and either renew them or delete them if you don't need them anymore.

This should stop the warning messages from generating and hopefully this will fix your issue as well. In addition, I would suggest going through all the levels of your certificates and just doing a cleanup because certificate maintenance is something that many admins forget to do on a regular basis.