What is the cause of this Active Directory error message?

I am receiving the following message on the Event Viewer. I can't find the servers referred to in Active Directory Sites and Services:
The Directory Service consistency checker has determined that either (a) there is not enough physical connectivity published via the Active Directory Sites and Services Manager to create a spanning tree connecting all the sites containing the Partition DC=CPMCP,DC=CPO,DC=com, or (b) replication cannot be performed with one or more critical servers in order for changes to propagate across all sites (most often due to the servers being unreachable).

For (a), please use the Active Directory Sites and Services Manager to do one of the following: 1. Publish sufficient site connectivity information such that the system can infer a route by which this Partition can reach this site. This option is preferred. 2. Add an ntdsConnection object to a Domain Controller that contains the Partition DC=CPMCP,DC=CPO,DC=com in this site from a Domain Controller that contains the same Partition in another site.

For (b), please see previous events logged by the NTDS KCC source that identifies the servers that could not be contacted.
Do you have any idea what I can do?
This was first published in December 2003

Dig Deeper



Find more PRO+ content and other member only offers, here.

Have a question for an expert?

Please add a title for your question

Get answers from a TechTarget expert on whatever's puzzling you.

You will be able to add details on the next page.



Forgot Password?

No problem! Submit your e-mail address below. We'll send you an email containing your password.

Your password has been sent to:









  • Virtual desktop security guide

    To secure virtual desktops, consider antivirus, certificates and network vulnerabilities. Just remember, VDI doesn't always ...

  • Guide to low-cost desktop virtualization

    In this guide, learn to virtualize desktops without spending more than you would when deploying PCs, and what VDI vendors are ...

  • VDI pilot project guide

    A VDI pilot project should start with a VDI project plan. Know what pitfalls to avoid and test product options to achieve a ...