Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
Sure, if your calendar is on a server. I am guessing since you use Office, you probably use an exchange server. Just connect both to that server.

If you are using local calendars, then I'm not sure, but probably not easily.
 
You don't have to do anything special. I do this with my school exchange email and calendar. Just subscribe to the link in iCal. Do you need step by step?
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.