The Management > High Availability > Status tab lists all devices involved in a hot standby system or cluster and provides the following information:

Reboot/Shutdown: With these buttons, a device can be manually rebooted or shut down.

Remove Node: Use this button to remove a dead cluster node via WebAdmin. All node-specific data like mail quarantine and spool is then taken over by the master.

Click the button Open HA Live Log in the upper right corner to open the high availability live log in a separate window.