Liferay Social Office Enterprise Edition is a dynamic team workspace solution that provides holistic enhancement to the way you and your colleagues work together. By adapting today's most innovative social technologies to the unique needs of productivity and goal-driven enterprise teams, it enables an important shift in how and why communication happens. Key features include, but are not limited to:

Documents: enhanced shared document repository with Microsoft Office integration and multiple site connectivity with Sync (available separately).
Communication: instant notifications, team calendars, webmail, task management and contact management.
Collaboration: integrated threaded discussions, blogs, and wikis with related assets and federated search.
People: searchable user profiles with user tagging, friending, integrated chat and simplified Social Office user management.
Mobile: responsive theme that allows your users to collaborate from any device.

Social Office EE comes bundled with the Sharepoint Document Library connector.