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

Sep 28, 2022 7:24 AM in response to samhm1

Same here... 12.6 and agenda sync from MacBook to Exchange Server still quits after a while. Other iOS devices seem to keep syncing (iPhone) strangely enough. I have changed the refresh interval in calendar settings from 'Push' to 'Every minute'. Curious to see if that works for now... A normal restart of my MacBook seems to do the trick as well (although temporarily I guess). Apple needs to fix this! All our employees work with a Macbook and an office 365 account for mail and calendar.

Oct 8, 2022 1:06 AM in response to Redinma

The problem persists in 12.6.


This works here as well:


launchctl stop com.apple.CalendarAgent
launchctl start com.apple.CalendarAgent


I have the idea to automate these commands and have them run once per hour. In my search I came across launchd, but I am not an expert and have not been able to implement it successfully. Does anyone know how to do this and could post a step by step guide?

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Exchange calendar not syncing in macOS Monterey 12.3

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