Ah, the things you find when you’re looking for something else. I was extracting some icons from Window Vista with the excellent Axialis IconWorkshop and stumbled across MSSVP.DLL in the SYSTEM32 folder. It looks to be a part of Windows Seach. Well, this file has a number of Outlook icons in it and I don’t even have Office 2007 installed on that particular installation of Vista. What a strange behemoth Microsoft is. Here’s a look at the file properties and icons contained within: