I am trying to create a company calendar where the few people in the company can enter their vacation days, sick time, travel days, etc. My problem is that I want each person in the company to be able to request the time without it showing up on the calendar until it has been approved. I have setup a shared calendar where it works except as soon as I request a day off, everyone sees it before it's approved. I don't want it to be visible on the calendar until it has been approved. Is this possible? I am running Exchange 2010 and Outlook 2010/2013.