I added new feature for Alfresco, where you can open and edit MS Office directly from the toolbar-> Create Content menu in the Share documentlibrary (like Sharepoint).
What happens is similar to the edit-online except no document exist in Alfresco, before a save from MS Office is performed.
A work-around is also there for MS Office 2011 for Mac, which does not provide web location folder for saving. This works by copy-in and using edit-online.
https://addons.alfresco.com/addons/ms-office-creatable
