Update: Well, the issues have returned for me after just a few days. Looks like this wasn’t a fix after all. So, consider the post notice that there’s a real problem with syncing the Calendar with an Exchange server, at least for some folks.
If you’re like me, you’ve experienced some issues with the Calendar app synchronizing with an Exchange server. You might also have some issues with the Reminders app keeping in sync as well.
For me, the problem manifested itself most often with the following error:
Calendar can’t save the event “Item title” to the Exchange server.
The account “Exchange” currently can’t be modified. To discard your changes and continue using the version of your calendars that’s on the server, click Revert to Server.
The options on the dialog box are:
- Revert to Server
- Try Again
Calendar items and reminders would sync eventually in most cases, but the error would pop up apparently randomly. It was driving me batty.
Fortunately, the fix seems to be pretty straightforward, and the hat tip goes to a member of the Apple support community. In this thread, the member furyg3 outlines the steps to resolve the issue:
- Open Calendar (formerly iCal).
- Go to the Calendar menu and select Preferences.
- Select the Accounts tab.
- Remove the Exchange server account which is giving you the error messages. This calendar will be removed from the Calendar app.
- Go to System Preferences and click on the “Mail, Contacts & Calendars” pane, find your Exchange server account, and check the “Calendars & Reminders” option to re-enable your calendar.
This is working for me. Give it a try, and if it works for you let me know in the comments.