Hi Rachel,
Thanks for reaching out and good questions!
Will the iCal importer work on a recurring basis for another installation of The Events Calendar? Where do you find the recurring URL?
Yes! iCal Importer will indeed fetch events from another installation of The Events Calendar on a recurring basis. You can snag that URL directly from the other site, such as [site-url]/[events-slug]/ical
Also, is communication for recurring events both ways?
iCal Importer is really a one-way communication in the sense that it asks other sites for a feed of events that it can use to pull events from there and into your site. You can pull those on an automated, scheduled basis and, if updates are available for specific events, import those as well.
Where iCal Importer isĀ not a two-way communicator is that it will not send events from your site to other sites. You can always provide the same /ical URL to other sites if you want them to collect events from your site, but iCal Importer does not push those events on its own.
Does this help answer your question? Please do let me know!
Cheers,
Geoff