Data replication
The HMC provides many different configuration options for controlling user operation controls, and most customers have multiple HMCs for redundancy. While configuration could be performed separately at each HMC, the data replication feature of the HMC is provided to help in large installations with many HMCs.
For example, the system administrator can use the Configure Data Replication task to configure a primary HMC that configures all of the user-related characteristics for that HMC and for a set of replica HMCs. There is no need to worry about important configuration data being compromised while it is shared with the other HMCs because this data, like all other data sent between HMCs, is encrypted.