OSX Calendar not showing Exchange Account

So because the mail app from Apple is far from perfect and never showed me the date and time of calendar invites from MS Exchange environments (after the Yosemite update) I was adviced to re-add the exchange account in Preferences -> Internet Accounts.

After doing that, the calendar app just won't show the exchange account anymore. It's right there in the settings, but not in the panel:

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Can anyone tell me how I get my exchange calendar back to the calendar app?

Thanks in advance for any help.

PS.: the bug in mail (no date&time for cal invites) wasn't fixed by this btw.

Solution 1:

I feel stupid for answering this myself because the "fix" is idiotic.

Remove the exchange account
Restart the mac
add the account back -> everything works.

I hope another answer gets two upvotes if they help someone so they're assigned the bounty I put out on this question. Thanks for the answers!

Solution 2:

You could try clearing the calendar cache and see if that resolves it:

Quit Calendar

Go to ~/Library/ by typing ⌘+⇧+G in the Finder and copying that path into the dialog that shows.

In the ~/Library/Caches/ folder, look for com.apple.ical and move it out to your Desktop (it might not exist).

In the ~/Library/Calendar/ folder look for files named Calendar Cache and move them out to your Desktop.

Reopen Calendar

At this point, you might also want to try disabling and re-enabling your Exchange account in the Calendars Accounts pane.

Solution 3:

I recently encountered this on a Mac running 10.11 El Capitan. The Exchange account was active in System Preferences -> Internet Accounts and the Calendar was checked to sync, but the Exchange calendar did not show up in the sidebar of the Calendar application.

To resolve this, we deleted the Exchange account in Internet Accounts and then re-added it back in.