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.
Exchange Online Archiving for Exchange Server
A personal e-mail archive for users who have mailboxes on Exchange Server 2010 or later.
Exchange Online Protection
Advanced anti-malware and anti-spam protection for email deployments.