We operate a domain with subdomains which we planned to use in Office 365. We have about 80 addresses on the domain.
Two issues here:
1 During Office 365 preview setup we are told to enter all email addresses on our domain. The instructions make no distinction between a user (distinct email address) and a user (paid subscription). Only a couple of our email addressees will use Office 365.
First question: does each distinct email address count towards the limited number of Office 365 users?
2 In researching the previous point I saw a comment that Small Business Premium cannot bring in subdomains.
Second question: If that is true, what are our options?
Third question: Would we be better to leave our existing site outside Office 365 altogether, creating a new office site in Office 365, to which we forward the handful of office addresses? If we do that, how do we get our outward "Sent from" addresses correct?