Creation Date of Outlook/Exchange Calendar Event

In Outlook 2010 or Outlook 2007 you can change the calendar view to list, Then add columns that will show different fields, To do, once in the list view, go to View settings, in advanced view settings select columns, There a number of field types to chose from, find the one that has "Created", "modified" and you might also want to find "changed by", These additional fields in the list view will give you the informaiton you want.

In 2013: Click on "VIEW", Choose "Change View" and choose "list" On the top left corner of the data, right click on the icon that looks like a sheet of paper. Choose "View Settings" Sellect "Columns..." Then add the colums you wish to view in your list of data. Change the dropdown under "Select available columns from:" to "All Appointment fields" Add the columns you wish to have shown by left clicking on your choice and then click Add to move it to the left. I added "Created" and "Modified" to my columns. Don't forget to click Okay and Okay. The columns should now be in your list view data. I hope this works for you.