The CONFIGURATION SET CLUSTER_AUTHORIZATION command modifies the
    group number and password of a local area cluster, as recorded
    in SYS$SYSTEM:CLUSTER_AUTHORIZE.DAT. If your configuration has
    multiple system disks, SYSMAN automatically updates each copy
    of CLUSTER_AUTHORIZE.DAT, provided the environment is defined as
    a cluster (SET ENVIRONMENT/CLUSTER). For more information about
    CLUSTER_AUTHORIZE.DAT, see VSI OpenVMS Cluster Systems.

                                 CAUTION

       If you change either the group number or the password, you
       must reboot the entire cluster.

    The file CLUSTER_AUTHORIZE.DAT is initialized during execution
    of CLUSTER_CONFIG.COM and maintained through SYSMAN. Under
    normal conditions, altering records in the CLUSTER_AUTHORIZE.DAT
    file interactively is not necessary. To protect the integrity
    of the cluster membership use the CONFIGURATION SET CLUSTER_
    AUTHORIZATION command.