go to settings
tap on accounts and sync
tap on add an account
tap on your yahoo email
if you dont see the yahoo icon then tap on others folder
then set up email fill out your yahoo info , new PW, etc
When it opened it had my Domain\user name and Password settings. I changed my password and hit "Done." When I went back into my email it had synced up all my emails!
Hope you find this helpful. And if you don't go to the samsung website and have a live chat!