Microsoft is now starting to migrate new machines to the Office 2013 platform. The Sales Insight Plug-In for Outlook is not compatible with Office 2013 (only for 2010 version). This causes an issue for my new hires as they cannot track correspondence.
I would hope that this is already on the Roadmap for release, but after submitting a case to Marketo Support was told that I needed to submit Office 2013 Plug In as a 'new idea.'