A few questions about searching via ZxMobile

1. After I setup an account on Android with "Corporate" email, I see my Inbox and folders but there is no search option. Is this something I need to add on the ZxMobile side or is something else wrong?
2. Will search allow searching across all messages on the server side, or is it only limted to messages downloaded to your device? We're switching from Google Apps, and one of the nice things about Google Apps was the ability to search across all folders on the server very quickly.

Thanks for your help!