Can I limit the iCalendar subscription to only include events in certain categories?
Yes, but you’ll need to edit the URL yourself, adding a parameter called “Categories” with the categories that you want. For a single category, say “Meetings”, use Category=Meetings. For multiple categories, you need to use a list of category names, separated by %1C. E.g. here’s the link to subscribe to an iCalendar feed for the “MyCalendar” calendar, but only for the categories “Out of Office” and “Vacation”: http://www.brownbearsw.com/freecal/MyCalendar?Op=iCalSubscribe; Categories=Out%20of%20Office%1CVacation;x=1 (That’s all one line, and note that for category names w/spaces you need to use %20 instead of a blank space.