When you leave an Active Directory domain, the cluster's machine account is deleted from the Active Directory domain controller.
If the Active Directory domain controller is not accessible to the cluster when you try to leave the Active Directory domain, the leave will fail. In this case, you can effectively force the cluster to leave the Active Directory domain by removing the Active Directory configuration from the cluster. The machine account will remain on the Active Directory domain controller, where it can be manually deleted.
To leave an Active Directory:
In VAST Web UI, in the Active Directory tab, right-click the Active Directory configuration and select Leave.
In VAST CLI, run the activedirectory modify command with the
--disabledoption.