Exchange Online (Plan 1)
Messaging, calendaring, and email archiving plan accessible from Outlook on PCs, the Web and mobile devices.
Exchange Online (Plan 2)
Best messaging and calendaring plan accessible from PCs, the Web and mobile devices with advanced archiving, compliance and integrated voicemail capabilities.
Office 365 Business Essentials
Online versions of Office with email, instant messaging, HD video conferencing, plus 1 TB personal file storage and sharing. Does not include Office suite for PC or Mac. For organization with up to 300 users.
Office 365 Business Premium
The Office suite for PC and Mac with apps for tablets and phones, plus email, instant messaging, HD video conferencing, 1 TB personal file storage and sharing. For organizations with up to 300 users.