Exchange calendar not working on El Capitan

Same issue. I have an invite in my calendar sent to 4 individuals and an email list/group (always worked in the past).

The individuals got the invite and responded - no email back to me, just a tick in the invite. The group email never received the invite. I was able to email them the invite (an option in iCal), but again I am not seeing their responses.

But wait...also, though the event is in my iCal calendar I do not see it when I view my calendar via OWA.

Same here. I did get it working at one point by deleting the Exchange account via System Prefs->Internet Accounts, then adding it again via Calendar, i.e. open Calendar, go to Preferences, Accounts. I did this a few days ago but now it's not working again.

I'm having the same issue. Apple mail is working okay, just cannot get to calendars since upgrading.

I am having the exact same problem - since installing El Capitan my exchange calendar will not work. I am receiving e-mail but my calendar is completely empty. I tried deleting the account and reinstalling but nothing seems to work.

Is there a fix for this if I don't have an iMac to copy my Calendar related files from? They are showing up fine in my iPhone and my iPad Air... just not in my MacBook Pro (mid 2015)

System Preferences / Internet Accounts / Exchange / Uncheck Calendars, then check Calendars again. This works for me.

I had the same problem and just re-installed my Exchange account from scratch and it is working now BUT now any entry I add into my MBP calendar goes to my iPhone and iPad calendar but any entry in these devices doesn't sync back to the MBP calendar. Does anyone else have this issue ?

After the initial upgrade, my Exchange calendar data was not showing up in iCal at all. Removed the Exchange account from the list in "Internet Accounts" and added it back. The existing calendar data from Exchange was showing now, however any new entries in iCal will not sync to Exchange.

Seems like the entire Exchange sync function is broken.

Hi JB. I left it overnight and on checking this morning everything is working for me now. It seems that after you remove and re-install the Exchange account it takes quite a while for it to sync up properly and start working. So if you have just done this leave it for 4-8 hours and then see if it is still not working.

It is pretty annoying that Apple don't want you that one will need to completely re-install your Exchange account to get it to work. Again if Apple want business users to use their platform for business then they need to jack up their service, support and information around items like Exchange. Or Apple will simply lose us back to Windows.

Send Apple feedback. They won't answer, but at least will know there is a problem. If enough people send feedback, it may get the problem solved sooner.

Feedback

Or you can use your Apple ID to register with this site and go the Apple BugReporter. Supposedly you will get an answer if you submit feedback.

Feedback via Apple Developer

After deleting the Exchange account again, closing iCal and closing Outlook, I added the account again and magically it syncs.

There is obviously some kind of issue caused during the El Cap installation.

Great! This worked for me too. Thanks a lot.

Worked perfectly. Thanks!

Since El Capitan, my Ical doesn't handle one Exchange account as it should.

While updating I keep on receiving this error:

I already tried deleting the account en reconnecting it. Didn't help.

Ik also work with Busycal, which handles Exchange much better than Ical. Not a problem at all.

I ask this, because I would like to try working with Fantastical 2, which uses the local cal accounts.

Suggestions, anyone?