Issue after canceling out of a CLuster aware update install

Question

Hello,

I was installing Cluster-aware updating (incorrectly) in my new Failover cluster and had to cancel during the install and now I have a computer object thats causing my Server manager to fail refresh. I've deleted the object from AD but its still showing up in Server manager in all servers no matter how many times I remove it. I've tried to run (cd C:\Windows\System32\wbem\Autorecover then running  for /f %s in ('dir /b *.mof *.mfl') do mofcomp %s) but that did not help and the CAUAnnex5fe8jyb is still showing up. I have tried the registry hack too but it just changed back to 1. If I try to run the command to remove the Cluster aware updating it just fails and says one does not exist so I cancelled it in the worst time. I am hoping someone can help me out here. I have 4 servers that will not refresh because they cannot contact CAUAnnex5fe8jyb because it does not exist!

Thank you!

Scott

Answer 1

Hello Scott,

Thank you for your question and for reaching out with your question today.

To resolve the issue with the lingering Cluster-Aware Updating (CAU) object causing Server Manager to fail refreshing, you can try the following steps:

1. Verify cluster health: Ensure that your failover cluster is in a healthy state by running the following PowerShell command on one of the cluster nodes:

   
      Test-Cluster -Node <cluster-node-name>
   
   

   Resolve any cluster issues that are reported.
2. Clear the CAU registry entries:
   • Open the Registry Editor (regedit.exe).
   • Navigate to the following path:

     
          HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\ClusterUpdate
     
     

   • Delete the entire ClusterAwareUpdate key.
3. Remove the CAUAnnex5fe8jyb object from Server Manager:
   • Open Server Manager.
   • Click on "Manage" in the top-right corner and select "Remove Servers."
   • Remove the servers affected by the CAUAnnex5fe8jyb object from the list and close Server Manager.
   • Open Server Manager again and re-add the servers.
4. Restart the WMI service:
   • Open an elevated Command Prompt.
   • Run the following commands:

     
          net stop winmgmt
     
          net start winmgmt
     
     

5. Refresh Server Manager:
   • Open Server Manager and wait for the servers to be discovered and added.
   • Check if the CAUAnnex5fe8jyb object is no longer present.

If the above steps do not resolve the issue, you can also try restarting the affected servers in the cluster one by one and verify if the CAUAnnex5fe8jyb object disappears from Server Manager after each restart.

I used AI provided by ChatGPT to formulate part of this response. I have verified that the information is accurate before sharing it with you.

If the reply was helpful, please don’t forget to upvote or accept as answer.

Answer 2

Hello This does not work. I can remove all the other servers from Server manager includng the (CAUAnnex5fe8jyb) but I cannot remove the server I am on. I went into the other servers server manager and removed them from the cluster so I could get them all but when I re-opened server manager all the servers automativally came back along with CAUAnnex5fe8jyb and refresh failed.

Answer 3

For anyone else encountering the same issue you can run the following from an administrative powershell session. This is also necessary if you pre-stage a computer object but do not have the OU permissions set correctly the first time.

1. Find the failed CAU objects: Get-ClusterResource
2. Remove the failed CAU objects: Get-ClusterResource <CAU object name> | Remove-ClusterResource
3. Remove the CAU objects from Server Manager
4. Restart Server Manager

The CAU objects should then be gone.