Outlook December 2014 Updates
The below is an excerpt from the December 2014 Office and Outlook updates. This was the first release of an Outlook 2010 build which supported MAPI/HTTP.
However there were some serious issues, and the documentation states that the January 2015 build is the first release that should actually be used.
Description of the Office updates: December 9, 2014
KB2899591 for Outlook 2010 December 9, 2014