When you create a Windows Server 2012 failover cluster, the following event may be logged in the System log:

Event ID 1222 (Microsoft-Windows-FailoverClustering)
The computer object associated with cluster network name resource could not be updated.Unable to protect the Virtual Computer Object (VCO) from accidental deletion.

When a failover cluster or a cluster role is created, a computer account (a so-called Cluster Name Object (CNO)) is created in Active Directory. Since Server 2012, these objects are flagged to prevent accidental deletion. If the main cluster resource (also a computer account) does not have the required permissions on the OU containing the CNOs (by default, this is the   ...