Event ID - 64

Event Id64
SourceMicrosoft-Windows-CertificationAuthority
DescriptionActive Directory Certificate Services cannot publish enrollment access changes to Active Directory.
Event InformationAccording to Microsoft :
Cause :
This event is logged when Active Directory Certificate Services cannot publish enrollment access changes to Active Directory.
Resolution :
Enable AD CS enrollment access changes to be published to a domain controller
To fix publishing failures from Active Directory Certificate Services (AD CS) to Active Directory Domain Services (AD DS):
1.Confirm the CAs connectiion to a domain controller.
2.Confirm that the certification authority (CA) has necessary permissions to essential AD DS containers and objects, which will allow enrollment configuration changes to be published.
Note:To perform these procedures, you must have membership inDomain Admins, or you must have been delegated the appropriate authority.
1.Confirm a CAs connection to a domain controller
To confirm a CAs connection to a domain controller:
1.On the CA, open a command prompt window.
2.Typeping , where server_FQDN is the fully qualified domain name (FQDN) of the domain controller (for example, server1.contoso.com), and then press ENTER.
3.If the ping was successful, you will receive a reply similar to the following:
Reply from IP_address: bytes=32 time=3ms TTL=59
Reply from IP_address: bytes=32 time=20ms TTL=59
Reply from IP_address: bytes=32 time=3ms TTL=59
Reply from IP_address: bytes=32 time=6ms TTL=59 3
4.At the command prompt, type ping , where IP_address is the IP address of the domain controller, and then press ENTER.
5.If you can successfully connect to the domain controller by IP address but not by FQDN, this indicates a possible issue with Domain Name System (DNS) host name resolution. If you cannot successfully connect to the domain controller by IP address, this indicates a possible issue with network connectivity, firewall configuration, or Internet Protocol security (IPsec) configuration.
Confirm permissions on essential AD DS containers and objects
To confirm that the CA has necessary permissions on AD DS containers and objects within these containers:
1.On a domain controller, clickStart, point toAdministrative Tools, and clickActive Directory Sites and Services.
2.Click Active Directory Sites and Services [domainname]where [domainname] is the name of your domain.
3.On theView menu, click Show Services Node.
4.Double-clickServices, double-clickPublic Key Services, and right-click each container listed below, or the objects listed within the container, and clickProperties.
5.On theSecurity tab, confirm the required permissions.
Reference LinksEvent ID 64 from Source CertificationAuthority

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