Fusion Anywhere is a separate product which you can learn more about at https://fusionanywhere.com. If you are licensed to use Fusion Anywhere, this window is useful in troubleshooting situations. It will show the last 100 events that happened since Fusion Server was launched (this information is not stored anywhere, so it is not kept between launches). The list is updated when the window is opened and each time you click the Refresh button.
It can take up to 30 seconds for Fusion Server to try to connect to Fusion Anywhere after it has launched or when Preference settings have changed.
You can open this window by going to Options → Fusion Anywhere Status Window in Fusion Server's Task Bar. It is not available from Fusion Client.