2014-01-22 15:55 AEST by Arthur Barrett - CVS could easily be registered as a cloud storage service for Office 2013 with almost no additional 
software required:
http://msdn.microsoft.com/en-us/library/office/jj984352.aspx

"To integrate with Office 2013, the provider must have its own method for syncing cloud documents from 
its service to a local folder. This enables Office 2013 users to work on cloud documents even when they 
are offline or have poor network connections. It also enables users to open and save documents quickly, 
without the delay of network latency."


If the signed-in Microsoft Office user adds the cloud storage service to their account:
- Office 2013 will treat all documents within that local folder as "cloud documents" in the Open and Save 
As user interface.
- Documents opened from or saved to that local folder will roam with the user if they have Office 2013 on 
another machine.
- In the case in which a user has added a cloud storage service on one machine, but has not installed the 
cloud storage sync client on a second machine, the Microsoft Office user interface will help the user install 
the cloud storage sync client to access documents from that second machine.