Exchange calendar not syncing in macOS Monterey 12.3

Every since upgrading to macOS Monterey 12.3, I'm having trouble with syncing my Exchange calendar in the native Calendar app. Note: by Exchange calendar, I mean the Office 365 calendar, a service my university subscribes to.


I am able to add the calendar to the native application and events do show up. But it seems that soon after that, it stops syncing and new events will not show even with a forced refresh.


Any ideas what to do? Is this is bug?

MacBook Pro with Touch Bar

Posted on Mar 31, 2022 4:13 AM

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Posted on Apr 20, 2022 5:34 AM

I also have this problem, and it's probably because Office365/Azure indicates my time zone as +1 (CET) instead of +2 (CEST). In my case, manually adjusting the time zone in Office365 was the solution. I adjusted the time zone to something that corresponded to my situation (in my case, I adjusted the time zone from Amsterdam (+1) to Athens (+2).


After deactivating/activating the account including a restart of macOS 12.3.1, everything works properly again!

74 replies

Mar 31, 2022 7:45 PM in response to thauxley

thauxley wrote:

Every since upgrading to macOS Monterey 12.3, I'm having trouble with syncing my Exchange calendar in the native Calendar app. Note: by Exchange calendar, I mean the Office 365 calendar, a service my university subscribes to.

I am able to add the calendar to the native application and events do show up. But it seems that soon after that, it stops syncing and new events will not show even with a forced refresh.

Any ideas what to do? Is this is bug?



If your iCloud Contacts, Calendars, or Reminders won't sync


Microsoft Support


https://support.microsoft.com/en-us/microsoft-365


Sep 9, 2022 7:29 AM in response to thauxley

Came BACK to this thread cause yes, version 12.5.1 BROKE the Exchange Calendar syncing. This time around I've made a script so I can just hit a button and have the terminal commands run. Cause you know, this will get fixed...and then probably broken AGAIN.


Took me awhile to find this thread. Feel like pulling up your history on here should be more complete and not just recent stuff but thats another topic.

Sep 9, 2022 8:53 AM in response to commanderclif_me

The fix of stopping / starting the agent is not at all working for me on ONE of my Mac's .. my X86 Mac is actually syncing ok - -as are my iOS devices (as noted) -- but my poor M1 MacBook Air -- even with the launchctl magic -- well -- still is not working - -I have a 5 minute "poll" cycle .. it's very frustrating..


I had one though -- could it be because I have Outlook open AND the Apple Calendar? Hmmm...

Sep 12, 2022 8:29 AM in response to Blues Guy

I don't use the Outlook app, I have my Exchange email account set up in Mac Mail app which I prefer.


As an odd aside to the Outlook app, my wife had an iMac from her office that use to get this screen blink/glitch that when it started would make the computer unusable, it looked similar to a graphic card going bad. In the end, it was just having the Outlook app running. Not sure WHAT was going on but after toubleshooting for here what it was, she started using outlook in a web browser and problem went away.

Sep 23, 2022 12:44 PM in response to NotStephenJobs

NotStephenJobs, and jcrossett, your solution does work. Partially, for me anyways. Here's my question for you:


Apparently using those commands does update things in the background. However, in Mac OS Calendar, I either still need to 1- Choose the menu "View", then 2- Click on "Refresh Calendars", or quit and re-open the app. Any ideas on how to tackle THAT side of the equation? BTW, what I am actually trying to accomplish here is to get a third party app to properly refresh automatically. I use "Timepage" by Moleskine Studio, and to have it display the correct new information I'm having to quit it and re-launch it.


Any thoughts? (This is quite frustrating.)


Thanks for any insights. Raphael.

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Exchange calendar not syncing in macOS Monterey 12.3

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