SharePoint Dragons

The old Office 365 P1 plan in the new 2013 release becomes Office 365 Small Business and is intended for companies of 1-10 persons, if you want to have the Office 365 clients as well, it’s called Office 365 Small Business Premium. The Administration UI is kept to the absolute minimum.

For companies of 11-250 persons, its called Office 365 Midsize Business. It has a more advanced Administration UI and more capabilities.

For companies of 250+ persons, its called Office 365 Enterprise, which has an Education variant (which only has a different licensing model) and a Government version that is only available in the US and has a completely isolated Data Center.