Universal Messaging Capabilities for Active/Passive Clustering
The following capabilities of Universal Messaging enable the vendor-specific cluster control software to monitor and manage Universal Messaging in an active/passive cluster.

Functionality to start, stop, and monitor the servers.

Ability to store the server’s state information and data on a shared disk.

Ability to survive a crash and restart itself in a known state.

Ability to meet license requirements and host name dependencies.