I have persistent problems with Calendar syncing. I frequently get meeting invites, changes or cancels from clients who use Outlook. I'll get an email with a file attachment always called "Mail Attachment.ics" Double clicking on it will expose my Calendar app but then almost always I get a pop up that says, "The server responded with an error. Access to "such and such meeting" in "such and such calendar" in account "iCloud" is not permitted. The server responded: "403" to operation CalDAVWriteEntityQueueableOperation" a which point I'm given the options to "Ignore," "Try Again" or "Revert to Server." Clicking any button only temporarily makes the pop up go away before returning a few minutes later.
Does anyone know what's going on and how to fix this? It's really annoying!
Does anyone know what's going on and how to fix this? It's really annoying!