Are you mainly looking for Office applications (like Word, Excel, Power Point) with or without a mailbox, look at the Office 365 Business Plans. For only email and keep your previous Office apps then choose for Office 365 Exchange Online packages. You can upgrade the licence later at any time to include Office 365 Applications for the users that really need it. When you don't need to sync mobile devices and simple POP/IMAP email is just enough, go for the Office 365 Exchange Kiosk Plans. For more than 300 users and/or RDS environment configurations choose for the Office 365 Enterprise Plans. Microsoft Visio/ Microsoft Project can be added as monthly subscriptions to your plan.
The best part? You can mix and match any of the above plans depending on your users needs with our flexible monthly plans.