How to configure primary and secondary control centers
NOTE: The steps below must be followed in the order given or the configuration will not function as intended
First, register the Email Security appliances on mysonicwall.com

Select the appropriate serial number for the Secondary Control Center

The Secondary Control Center will now display in Associated Products

Set to split mode with all roles, click Apply and wait for Services to restart

On the Primary Control Center, navigate to Manage | System Setup | Server | Host configuration

When data migration is complete, navigate to Host Configuration on the Secondary Control Center and configure the CIFS drive
CAUTION: Mount the drive, but DO NOT migrate the data
Navigate to Server Configuration on the Primary Control Center and add both the Primary and Secondary to the Control Centers section
Do the same on the Secondary Control Center then check the box next to Main Control Center and Apply
Wait for Services to restart then log into both the Primary and Secondary Control Centers and check settings