Adding User - No Email

I was setting up my Zoho Business account, I have my domain verified. Couple of things.

When trying to add a user - was not clear if I was supposed to add a user name or a full email address - the page was also unresponsive when I went to add someone.

I finally added them - but they do not have access to Zoho Mail

Does Zoho mail come standard when you add new users to your account? I would need to have new users have access to email.

Thanks!