Outlook 2013 Peek - Appointments for Subscribed Calendar?

[srprimeaux]

I really like the peek feature available in Outlook 2013 for viewing upcoming appointments. However, I can only view appointments that I've personally created. None of the appointments that appear on calendars I've subscribed to show up at all. For example, I've subscribed to my University's academic calendar and would really like to know when deadlines are approaching and when we have holidays, etc. Is this even possible? Or is it limited to a single calendar?

Thanks for the help!