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When issuing Enterprise Root-CA, it shows "Active Directory Certificate Services could not connect to Global Catalog Server"

Anonymous
2024-08-21T04:01:51+00:00

I'm working on ADCS in my environment. I've configured a GPO to let domain computers auto-enroll the certificate from CA Server.

However, when the domain computers request a certificate, the CA server shows "Denied by Policy Module 0x8007003a, Active Directory Certificate Services could not connect to Global Catalog Server". But what interesting is, the certificate somehow will issue successfully when the domain computers requested several times.

Lemme give you some background of my environment.

6DCs (subdomain.root.domain.com) + 2DCs (root.domain.com)

All DCs are configured as Global Catalog Server. The CA Server is located in "subdomain.root.domain.com".

Have no idea to troubleshoot with this issue.

It will be great if any of you can help on it.

Windows Server Identity and access Active Directory

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  1. Anonymous
    2024-08-21T06:42:21+00:00

    Hi Samuel_TRX,

    Thank you for posting in the Microsoft Community Forums.

    1. Check network connectivity and DNS resolution

    Network connectivity: Ensure that the CA server has a stable connection to all global catalog servers. Use tools such as ping or telnet to check the network connection status.

    DNS resolution: Make sure that the DNS settings on the CA server are correct and can resolve the IP addresses of all global catalog servers correctly. You can use the nslookup or dig commands to test DNS resolution.

    1. Check the global catalog server status

    Verify that all DCs configured for global cataloging are functioning properly and that services such as LDAP and GC (Global Cataloging) services are started without errors.

    Check the DC's event viewer for errors or warnings related to global cataloging.

    1. Review ADCS policies and permissions

    Certificate template permissions: Ensure that domain computer accounts have sufficient permissions to request and enroll certificates. Check the access control lists (ACLs) for certificate templates to ensure that the appropriate users and groups are included.

    Policy Module Configuration: Check the ADCS policy module configuration for any settings that may be causing connectivity issues. This may require looking at the ADCS log files for more information.

    1. Analyzing and resolving errors in ADCS logs

    Review the ADCS log files, especially entries related to certificate requests being denied. The log files usually contain detailed error messages and possible solutions.

    If a specific error code or message is mentioned in the logs, you can use this information to search for a solution in Microsoft's official documentation or support forums.

    1. Consider network latency and load

    A complex network environment or the presence of a high load may cause the CA server to fail to connect to the Global Cataloging Server in a timely manner on the initial request. After multiple requests, due to caching or other factors, it may successfully connect to the global cataloging server and issue certificates.

    Consider optimizing the network configuration or increasing the number of global cataloging servers to improve performance and reliability.

    1. Upgrades and patches

    Ensure that the ADCS and all DCs have the latest security updates and patches installed. Occasionally, known issues in the software are resolved with an update.

    Best regards

    Neuvi

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