The management server in the Cluster Management Console cannot communicate with cluster monitor. To minimize the amount of management downtime and to maintain cluster histories in the database, Symantec recommends that you upgrade the management server first.
The upgraded management server can immediately begin to monitor and manage any direct-connection clusters in your enterprise. It cannot monitor or manage any clusters connected through cluster monitor until you upgrade each cluster monitor to cluster connector. From the time that you finish upgrading the management server until you upgrade cluster monitor, the status of the associated cluster is unknown.