If you look closely in your SharePoint farm, you will see references to Office.com in some of the ribbons and dialogs….
When you click on the link or button, instead of opening up a window into thousands of SharePoint apps from Microsoft and Community, unfortunately it doesn’t seem to show anything
Someone asked recently if it was possible to turn these off as they can be confusing for users. Well the answer is yes, you can turn the links off easily, if you know where to look. To do so, navigate to Central Administration and choose Manage Farm Features.
Locate the ‘Office.com Entry Points from SharePoint’ feature and click on ‘Deactivate’.
You will be presented with a warning message, continue to click on the ‘Deactivate this feature’
And voila, the references are gone.