iCal not accepting windows ".ics" invitations since enabling iCloud..

http://support.apple.com/kb/HT2513?viewlocale=en_US&locale=en_US

you need to add your email account in iCal (= add a calendar), and activate invitations download in Preferences/Advanced, and then invitations show in iCal.

This is 2014... still the problem hasn't been solved. Wake up Apple!!!!!

Holy crap, this is it! I just opened the .ics I was just testing in TextWrangler and checked the location: "three-way call". Removed the dash in three-way and saved it, double clicked and it opened in Calendar just fine!

Amazing. What a stupid, stupid bug. Hopefully Yosemite has this fixed.

Update — interestingly enough, this seems to be the case with the ics earlier that was created by Outlook (PRODID:-//Microsoft Corporation//Outlook 15.0 MIMEDIR//EN) but does not happen with an .ics I created in Calendar with a dash in the Location field. Go figure.

I can't believe I just figured this out. If the Events are coming from an MS Server account then all I had to do was add my account to the calendar and this all went away. Sheesh! Basically go to the mail account setting and sync the "calendar" as well as the email address. This can be done on both your macbook or iPhone. What a relief!

My workaround for this has been to drag the .ics from Mail directly to the Calendar sidebar onto the calendar I want the event to apply to, and it appears in the Calendar inbox. One less step than them auto-adding, but hey, it works.

Still though, why isn't this fixed?

Wow, I think this explains it. I believe now that all the event invites that weren't auto-importing were being sent by Google users, and being intercepted by "my" Google Calendar, which I do not use (I have a Google account associated with my email for use with Analytics, etc, but not Calendar or contacts or Gmail etc). Basically I think all invites sent by other Google users to my email get checked by Google to see if there's an associated Google account (which there is, even though I don't actively use Calendar), then associates the event with that specific calendar, then sends me the email notification which has links to accept/decline/etc linking back to Google Calendar, which I never click on. But since I don't SYNC that calendar to Apple Calendar, it doesn't auto-import because it's not seeing the associated calendar listed. Hence why it doesn't auto-import BUT I can drag and drop onto another calendar in the list, like my REAL primary calendar which I sync over iCloud.

I can't seem to find a way to disable Google Calendar for an account, and my fear is that you can't. :/ Contemplating setting up a Gmail address specifically to get my other services migrated to that, so I no longer have my non-Google email address getting associated with this stuff. Not sure that's worth the hassle yet but I'm not sure there's another way to fix this.

Or, maybe not. I just got one from an Outlook.com account, which I do not have, so that rules that out.

Thanks Sjoerd. This was helpful.

Thanks... this work around made me stop pulling my hair out....but come on Apple....can't you fix this???

Hi, I don't have an issue with import new events from an exchage account into my iCal account, the problem comes when the sender wants to change or cancel the appointment. When I double click or drag and drop the event into mail nothing happens. I have tried clearing my cache, restarting iCal, re-adding my account and nothing seems to work. I don't want to move to another application especially one I have to pay for. Does anyone have any other advise they could offer. I am running the OS X Yosemite.

Thanks in advance.