Remove a tentative meeting that's automatically added to your calendar

When you receive a meeting invitation, Microsoft Outlook automatically adds the meeting to your calendar as a tentative meeting. If you delete the invitation, the tentative meeting remains in your calendar, and Outlook adds the following entry to the Application log:

Source: "Outlook"
Event ID: "64"
Level: "Information"
Description: "A meeting request has been deleted but the meeting will remain tentative on the calendar 
until the user either chooses a response or deletes the item directly from the calendar folder. Subject:
<meeting title> ..."

If you want to remove the tentative meeting from your calendar, or from the calendar of a mailbox for which you have delegate permissions, follow these steps:

  1. Right-click the meeting in the calendar, and then select Decline or Delete.

  2. Select any of the response options.