CLUSTERS
When a server is BUSY, access requests fail over to another server in the cluster, if one is available. If no other server is available, the original server takes the access request, even though it is BUSY. No request is denied access because a server is in a BUSY state. Each time an access request is redirected, Domino generates a workload balancing event in the Domino server log file.
The server availability threshold does not affect replication. Replication occurs even when a server is in a BUSY state.