I just got the EAP225-Outdoor and have it setup and can login to it with my browser.  I have set up a new userid and password too.

I bought this to extend an existing wifi network outdoors.  The unit comes up with its own wi-fi SSID which I can connect to with my iPhone just fine.

I need to know how to configure it to extend the existing wi-fi, meaning, at a location outdoors from the building, I want to be able to login and use the existing wifi network and not just the one that comes up with the EAP225-Outdoor.

Can you please share step-by-step instructions for how to do this.