Becoming a primary/secondary Apex
Prerequisite(s):  
Ensure you have defined the secondary Apex. See Defining a failover Apex.
 
If you have two Apex systems, follow these steps to switch roles of the Apex systems. These instructions assume you want to promote the secondary server to the primary server.
1. In the web interface, click System > Settings.
2. In the System Settings pane, click Failover.
3. On the primary server, clear Set this server as primary.
4. On the secondary server, select Set this server as primary.
5. Click the accept icon .
 
The Apex systems communicate and exchange roles.