Office 365 for enterprise
Best offer for enterprise business or those with specialized compliance needs

ProPlus
Best for businesses that need Office applications plus cloud file storage and sharing. Business-class email not included.
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Office Applications:
Enterprise E1
(Not included)
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Best for businesses that need business services—email, file storage and sharing, compliance, and more. Office applications not included
Enterprise E3
Best for businesses that need the features of ProPlus and Enterprise E1, plus compliance and security tools and voicemail integration.
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Office Applications:







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Enterprise E5
Best for businesses that need the features of Enterprise E3, plus a unified communications solution with advanced meetings and voice capabilities.