I created a meeting invite and saved it as a iCS file, then posted a link to this iCS file on my company's Intranet site. Users can click the link to open the iCS file, and then click "Save & Close" to save the meeting to their calendar.

I am looking for a way to find all users within my company that have saved this meeting to their calendar. I am using Outlook/Exchange 2010. We have about 1200 users.