| Event Id | 15 |
| Source | Microsoft-Windows-CertificationAuthority |
| Description | Active Directory Certificate Services did not start: Version does not match certif.dll. |
| Event Information | According to Microsoft : Cause This event is logged when Active Directory Certificate Services did not start. Resolution Resolve a version mismatch on core AD CS files In order for Active Directory Certificate Services (AD CS) to function correctly after an upgrade, all components, including Certserv.exe and Certcli.dll, must be upgraded. To resolve this error, you can confirm whether a mismatch exists and then either restore the certification authority (CA) from a backup or reinstall AD CS. To perform this procedure, you must have Manage CA permission, or you must have been delegated the appropriate authority. To determine whether the version information matches: 1.On the computer hosting the CA, click Start Search, type Certserv.exe, and then press ENTER. 2.Right-click Certserv.exe, and click Properties. 3.Click the Details tab, and note the information under the File version heading. 4.Click Start Search, type Certcli.dll, and then press ENTER 5.Right-click Certcli.dll, and click Properties. 6.Click the Details tab, and note the information under the File version heading. 7.Compare the version numbers of the two files to see whether they are the same or different. 8.If a mismatch exists, replace either Certserv.exe or Certcli.dll with a matching version. You may need to go to backup media to locate matching versions. 9.If you cannot restore the individual files or otherwise address the problem, you may have to restore the CA from a backup or reinstall the CA. Verify To perform this procedure, you must have membership in local Administrators on the computer hosting the certification authority (CA), or you must have been delegated the appropriate authority. To confirm that the CA service is available: 1.On the computer hosting the CA, click Start, type cmd and press ENTER. 2.Type certutil -config |
| Reference Links | Event ID 15 from Source Microsoft-Windows-CertificationAuthority |
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