First, there does seem to be a bugzilla entry for this:
Bug 6491 - Allow automatic / scheduled reloading of feeds
We're migrating from an older calendaring system and need to have both in operation for a time. To ease the transition, we've written an export script from the old one that dumps an ical file for each user. We're importing them using the command line as follows:
zmmailbox -z -m
createFolder -c gray -F "#" --view appointment --url "http://somewhere/.ics" /OldCalendar
Problem is, we need that imported calendar to reload periodically (as often as possible) and having to get the users to manually right click and 'reload' is not an option.
Can this be done on the command line. The postRestURL command strangely doesn't seem to accept a URL and I can't find anything else that seems to do the trick.
Thanks for any help.