TidBITS Publishing has updated Joe Kissell's "Take Control of Calendar Syncing and Sharing with BusyCal." The ebook is now up to date in describing how to work with Exchange, plus it is generally updated for BusyCal 2.5.

Download this free ebook by Joe Kissell to learn how calendar servers and clients work, when to use iCloud, Exchange or Google Calendar for syncing and sharing, and how to construct a sensible calendar strategy for BusyCal 2.5 on your Mac.