Chapter 1 What’s New for FortiOS 5.2.1 : Usability Enhancements : FortiExplorer Setup Wizard Improvements : FortiWiFi
  
FortiWiFi
Several additional changes have occurred for FortiWiFi units, found in the LAN + WiFi Settings section of the wizard:
The default SSID is now named fortinetXXXX, where XXXX is the last 4 digits of the FWF serial number.
The default SSID is bridged with the internal network.
The default pre-shared key is different for each FortiWiFi unit.
A Show Password option has been added.