Microsoft released updated Service Descriptions for Office 365 for Enterprise on 13 January 2012. Below, I will list the major updates to the Service Description for SharePoint Online. Also available are the updates to the Exchange Online and Exchange Online Archiving Service Descriptions.
Changes were compared with Word 2010’s Compare feature:
Subscription Plans
Note: One very important change in this table (which lists the actual changes to the document) is that SharePoint Online E1 and E2 have set Enterprise Features from Yes to No.
Key Features and Specifications
Site Collections
Composites
Content
Search
Sites
Custom Development and Extensibility