Outlook Calendar Sharing and Permission Settings

Under Outlook, your calendar has several security settings that enable or disable access to other users. By default, your calendar settings should be set to Free / Busy Time. This means that other users trying to access your calendar can see the time blocks of your appointments, but not the details.

To access your Calendar permissions, open your Outlook program and access the Calendar section.
Right-click on Calendar under the heading My Calendars. It should be located on the left side of the screen.
Left-click on Permissions.
A new window will appear (Outlook Desktop example shown below). At the top, there will be a user named MY Orgranization, followed by a permission level. It should be set to Can View when I'm Busy. This is the default view for all people who view your calendar except those you give special sharing permission to.
If the Default is not set to Free/Busy Time
1. Left-click Default
2. Select Free/Busy Time from the dropdown menu
3. Click Apply (You have just changed the Default view others see when accessing your calendar).

In the event that your Default setting is not set to Free / Busy Time:
Left-click Default. Underneath, there will be a dropdown menu that lists all available permission levels, from Reviewer to Editor. Select Free / Busy Time from the list, then click Apply.