Microsoft today released a set of documents, providing a detailed description of the features and functionality of Microsoft Office 365 services.
Microsoft Office 365 features
The Office 365 service brings familiar applications, including Office desktop software and Office Web Apps, together with SharePoint, Exchange and Lync in the cloud, for the first time.
Separate downloads have been made available for Microsoft Exchange Online, Microsoft Lync Online, Office Pro Plus, Microsoft SharePoint Online and Microsoft Office Web Apps, which is the online companion to Microsoft Word, Microsoft Excel, Microsoft PowerPoint and Microsoft OneNote.
You can download the Microsoft Office 365 services features and functionality document from the Microsoft Download Center.
Check out this post on Office 365 Tools, tips, training and tricks for beginners.