Why does emPass Central Server heartbeat.html show old (orphaned) Agents (no longer present)

The emPass Central Server data.db is a database of the known Agents per the last contact from each agent . So, the timing of decommissioning an Agent and the removal from the Agents.txt could leave an Agent name orphaned in data.db. (This will be fixed in a future release.)

In the mean time, you can delete data.db (in the root install directory of the CS).

When you refresh heartbeat.html, you should see only the active Agents (sending a heartbeat).