Details of the event with ID 27 of the source Microsoft-Windows-CertificationAuthority

Event Source:	Microsoft-Windows-CertificationAuthority
Event ID:	27 (0x1B)
Event log:	Application
Event type:	Error
Symbolic Name:	MSG_E_INCOMPLETE_HIERARCHY
Event text (English):	Active Directory Certificate Services did not start: Hierarchical setup is incomplete. Use the request file in %1.req to obtain a certificate for this Certificate Server, and use the Certification Authority administration tool to install the new certificate and complete the installation.
Event text (German):	The Active Directory certificate services were not started: The hierarchical setup is incomplete. Use the request file "%1.req" to obtain a certificate for this certificate server. Use the certificate authority management tool to install the new certificate and complete the installation.

Parameter

The parameters contained in the event text are filled with the following fields:

• %1: RequestFileName (win:UnicodeString)

Example events

Active Directory Certificate Services did not start: Hierarchical setup is incomplete.  Use the request file in C:\csr_ADCS_Labor_Issuing_CA_1.req to obtain a certificate for this Certificate Server, and use the Certification Authority administration tool to install the new certificate and complete the installation.

Description

Do you know TameMyCerts? TameMyCerts is an add-on for the Microsoft certification authority (Active Directory Certificate Services). It extends the function of the certification authority and enables the Application of regulationsto realize the secure automation of certificate issuance. TameMyCerts is unique in the Microsoft ecosystem, has already proven itself in countless companies around the world and is available under a free license. It can downloaded via GitHub and can be used free of charge. Professional maintenance is also offered.

This event regularly occurs during the installation of a subordinate certification authority, since the requested certification authority certificate still has to be transmitted to and signed by a superordinate certification authority at this point.

Safety assessment

The security assessment is based on the three dimensions of confidentiality, integrity and availability.

No description has been written for this yet.

Microsoft rating

Microsoft evaluates this event in the Securing Public Key Infrastructure (PKI) Whitepaper with a severity score of "Low".

Related links:

• Overview of Windows events generated by the certification authority
• Overview of audit events generated by the Certification Authority

External sources

• Event ID 27 - AD CS Certification Authority Certificate and Chain Validation (Microsoft)
• Securing Public Key Infrastructure (PKI) (Microsoft)