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ERROR_CLUSTER_OBJECT_ALREADY_USED
ERROR_CLUSTER_OBJECT_ALREADY_USED means the requested cluster name collides with an enabled computer object in Active Directory. The object may be a live cluster identity or a stale object from a previous deployment.
What to check
- Confirm whether the computer object is owned by an active cluster or another service.
- Check directory replication and DNS before deciding that an object is stale.
- Use a distinct name or clean up the old identity through approved Active Directory administration.
Microsoft: Failover Clustering overview
Microsoft: Validate hardware for a failover cluster
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