I would like to share my calendar with someone who does not have a user account on my server. We both have our own OS X Servers, both running 3.2.1.
When I right click the calendar, I select "share calendar" and type the email address of the other person. I then get the message that the calendar could not be shared - no details no nothing.
I can share calendars with people who are hosted on the same server as I am, but it would be practical to share it with someone on a separate server.