Rated 5 out of 5 stars

Just wanted to share a great free way I discovered to synchronize multiple Lightning calendars and tasks - install a Dropbox on your computer.

When creating a calendar (in Windows), simply point the network pointer to "file:\\\<<Path to Dropbox .ics file>> which it sees as a local file. Do the same on the other computers on which Dropbox is also installed. You can create as many calendars or task lists as you wish and updating across the network is almost instantaneous.

This review is for a previous version of the add-on (1.8).  This user has a previous review of this add-on.