Event ID - 39

Event Id39
SourceMicrosoft-Windows-CertificationAuthority
DescriptionActive Directory Certificate Services did not start: The Certification Authority DCOM class for %1 could not be registered. %2. Use the Services snap-in to change the logon context for the certification authority
Event InformationAccording to Microsoft :

Cause

This event is logged when Active Directory Certificate Services did not start.

Resolution

Correct DCOM registration

Note:To perform this procedure, you must have membership in local Administrators, or you must have been delegated the appropriate authority.

To correct DCOM registration errors:
  1. On the computer hosting the CA, click Start , point to Administrative Tools , and click Services
  2. Right-click Active Directory Certificate Services , and click Properties.
  3. Click the Log On tab, and confirm that Local System account is selected.
  4. If it is not selected, click Local System account , and then click OK
  5. Right-click the service and then click Restart .
Caution: Because of the security requirements for the Active Directory Certificate Services (AD CS) service, logon accounts other than LOCAL_SYSTEM are not supported.

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 logon context is correct:
  1. On the computer hosting the CA, click Start , point to Administrative Tools , and click Services
  2. Confirm that the word Started appears in the Status belong for the Active Directory Certificate Services service.
Reference LinksEvent ID 39 from Microsoft-Windows-CertificationAuthority

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