Our organization signed up for the Office365 Small Business Premium with 5 user licenses. My question is how do we add an email address for someone (a 6th user) that does not include a Office365 Small Business Premium license. We don't want them to have access to O365 products, we just want to provide them with an email address @ourdomain.com. I don't want to have to pay for a full license when they will not be using the products, only email.