@deadsuperhero @paulfree14 @mhall119 It's a bit unfortunate that ActivityStreams events aren't at all compatible with iCal and AP only federates with itself. So you've got a mess trying to federate events. What I'm doing for Z6 is to provide the iCal as an attachment to the Event object, but there seems to be no elegant way to resolve attendance information. You should be able to see all the attendees in Thunderbird or Outlook (but you may not be able to message them directly), while in AP you'll only see the subset of attendees using AP to reply.