Go to my.utah.edu and log in with your uNID and password
Click on "uNID Tools" (towards the top left of the page)
A new page will open up and on the right side will be where to manage your Umail Account.
Here you can change your Umail to an Alias (so you don't have to type your uNID to use your email) and foward your Umail to another email address
