I have inherited an environment where things were not properly decommissioned. I have a cluster that was just shutdown and the machines were destroyed (deleted VMs), so the cluster object still exists in Active Directory. If I try to destroy the cluster using cluster.exe or Remove-Cluster in PowerShell, I get errors since both try to connect to the cluster to destroy it. I am thinking I am going to have to manually remove it from AD. Aside from deleting the Computer object, what else do I have to do? I want to make sure that it is not listed in the "cluster list" for AD (cluster /list -or- Get-Cluster -Domain contoso.com).

Hi dpmoody,

After we use remove-cluster to remove cluster we need also need Cleanup AD, you can refer the following KB to do it, if it not work please try to remove the cluster node forcibly.

The details steps please refer the following information:

Remove-Cluster

https://technet.microsoft.com/en-us/library/hh847273(v=wps.630).aspx

Failover Cluster Snafu Forcibly removing Failover Cluster Feature after Cluster Failure

http://blogs.technet.com/b/chrad/archive/2009/11/02/failover-cluster-snafu-forcibly-removing-failover-cluster-feature-after-cluster-failure.aspx

How To Clean Up Cluster Nodes from Destroyed Clusters

http://blogs.technet.com/b/canitpro/archive/2012/02/14/how-to-clean-up-cluster-nodes-from-destroyed-clusters.aspx

Im glad to be of help to you!