Within a company, there are occasions that you are not able to access your computer to send sick emails, or you get a call from your client on the way to the office that you have to drive to a client site straight away; when such things happen, you need someone else to update your calendar when you call in, so others are aware of your availabilities.
Always make sure that:
Figure: Click on "Share Calendar" in Outlook
Figure: Give admins full access to your calendar in Outlook with "Can edit"
Now do this to allow the whole organization to see your full calendar details:
Figure: Give the whole organization access to your calendar in Outlook with "Can view all details"
If you cannot see "My Organization" from Outlook Desktop version, use the web version:
Figure: Select the calendar to change permissions
Figure: Give the whole organization access to your calendar in Outlook with "Can view all details"
Once the permissions are given, opening other people's calendar is as easy as 2 steps:
Figure: Opening a shared calendar
Figure: Find the calendar you want
Then you can have this shared calendar shown in your Outlook.