How do I get the mail icon on the Yahoo toolbar to open my business mail account?

I would like to have the mail icon on the Yahoo toolbar open my Yahoo Business Mail account instead of my regular Yahoo mail. If there is a way to change the link on the main Yahoo page Mail Button that would be nice too.How do I get the mail icon on the Yahoo toolbar to open my business mail account?It should open whichever account you're signed in to. If you're not already signed in, clicking the mail icon should take you to the mail sign in page and then you can sign in to whichever account you want. If you're already signed in, it should take you to whichever account you're signed in to.