Microsoft came to Extended Results to design their calendar analytics tool in Excel. We made this happen in only a few weeks. by writing the interfaces connected to the Microsoft Exchange Server, modeling the data in PowerPivot, and then rendering the analytics into Excel. I think we did an excellent job and you can download and check out the extended results below.
Check it out and download it for FREE here: http://www.microsoft.com/downloads/en/details.aspx?FamilyID=4c13a670-3356-4d4a-a24b-d33143004eb6