Multiple My webMethods Server clusters, or individual nodes can use the same Universal Messaging Server. To identify that a node belongs to a cluster, My webMethods Server generates a unique identifier for the cluster in the MWS Cluster ID field. My webMethods Server appends the MWS Cluster ID to JMS topics and queues to distinguish the messages, intended for a cluster when using Universal Messaging as a JMS provider. You cannot edit the MWS Cluster ID field.