Note Only Outlook 2013 logs the event 64. Outlook 2007 and Outlook 2010 do not write the event 64 to the Application log. This applies whether you have the August 28, 2012 hotfix package installed or not.
If you are using an Outlook 2010 or Outlook 2007 build that is earlier than August 28, 2012, when you delete the meeting invitation from the Inbox, the tentative copy of the meeting is also deleted from the Calendar.
Article ID: 2771436 - Last Review: Feb 12, 2013 - Revision: 1