How to undo Calendars in Outlook

I apply the Calendars in Outlook to update my home works at University. I was just speculating, am there any means that I can undo an outcome in Outlook and have it associated with a matching Office file?
For instance, I have a dealing case expected following Tuesday, when I double-click on "Business Case" in my calendar, as a substitute of opening the information; it shows the definite Business Case .docx file on my device that I've charted to it in some way? Can you help me on this field of problem?
