There may be times when inter-site communications go down but sites are still running. In this case, a site is considered unavailable.

When a site becomes unavailable due to a communication error, it is not immediately failed over to another site. Instead, Process Server sets the site status to Unavailable, triggers an alert, and provides a Fail Over action for you to take, if desired.

Once a site has failed over, a new state called Failed Over is displayed, and the Fail Over button is removed.

When the unavailable/failed-over site begins communicating with the other sites (sends a heartbeat), the site automatically becomes available.