Your Outbox is a holding area for emails you've sent, but have not been delivered to the servers yet (this means they're still living on your computer).
Note: Delegate permissions are used when you want someone else to help you manage your calendar and track events.
You can also request that the recipient share his or her Exchange Calendar with you.
In order to view someone else's calendar, that person must share his/her calendar with you as well.
If a user only sets permission levels to allow free/busy or free/busy limited details, an Outlook 2011 user will not be able to see any details of the shared calendar.
Microsoft does not currently offer the option to update a meeting invite in Outlook without sending an update to all the meeting attendees. This will generate an automatic email to the attendees for this meeting.
Important: Beginning March 1st, 2017, Office 2013 will no longer be available for installation from the Office 365.
Track meeting responses in Outlook View Tracking Status under Meeting tab.
See screenshot: If you are using Outlook 2007, please click Tracking in the Show group under Meeting tab.3.
This article describes how to keep Outlook from accepting all invitations as "Tentative" and how to keep them from appearing on your calendar before you have accepted them.
Note 1: Even though a meeting request will no longer be automatically added as Tentative to your Calendar upon receiving, it will still be added as Tentative as soon as you select the meeting request in your message list.