wiped out all device data from security option and then re-installed os. from app loader it showed the email setup application was installed. but when clicked on email settings icon, it was again redirected to browser.
i'm not sure it was caused by os upgrade. i downgraded to previous version 4.6 but found same. I used the application to set up all my email accounts from device about year ago. no idea when it turned to browser.
searching Internet these days. another guy reported he had two icon, one linked to browser, the other to email setup application, but no one can explain