Microsoft 365 was originally unveiled last year at Inspire 2017. An all-encompassing package that includes Office 365, Windows 10 and Enterprise Mobility + Security, the new offering debuted with two configurations positioned at different segments of the market: Microsoft 365 Business and Microsoft 365 Enterprise.
Microsoft 365 Business is designed specifically for small-to-medium sized businesses with up to 300 users. This offering only offers basic security features, but still acts as a great turnkey solution for smaller businesses who want a more integrated and secure way of using Windows 10 and Office 365.
Office 365: A cloud services platform that offers familiar Microsoft products like Word, Excel, PowerPoint, and OneDrive (along with other productivity services) either online or on-premises via a subscription plan.
Microsoft 365: An all-in-one bundle that includes the Office 365 suite, Windows 10 Pro and Enterprise Mobility+Security for a complete, interconnected experience.
The following document below will better assist.