When you attempt to use their provided plugin you receive an error message which says ‘This gadget requires Microsoft Office Outlook 2007’.
Go to the download page: [DOWNLOAD] Windows 7 – Office 2007, 2010 & 2013 Desktop Gadgets
Microsoft no longer support the desktop gadgets for Outlook (2007, 2010 or 2013) and do not have a version available for download on their website.
Originally they provided a version of Outlook 2007 which you are able to customise to work with Outlook 2010 or Outlook 2013.
Preconfigured versions of the gadget can be downloaded from here [DOWNLOAD] Windows 7 – Office 2007, 2010 & 2013 Desktop Gadgets.