Shared Calendar disappears from Outlook after every restart

david-cslu 101

Hello

Issue is this:

User wants to see the calendar of two of his coworkers in his Outlook (Desktop App)
He can add them in Outlook and they'll show as expected
However, after restarting Outlook, one of the two shared calendars always disappears from the Outlook Desktop App, so it hast be manually re-added each time Outlook is started

When using the web version of Outlook, both of the shared calendars are always there, so the problem seems to be limited to the Desktop App.

This exact issue has been reported numerous times online, the Microsoft Community forums have dozens of questions about it.

However there they're either told that its "out of the support scope" of the Microsoft Community forums and that they have to come here - or there are standard answers given (reinstall office / do office repair / create new outlook profile) that don't seem to solve the problem for anybody. (We tried a couple of those and they didn't solve it for us.)

I'm certain somebody must know the solution...

Terry Doster 0 Reputation points

2023-07-03T16:51:08.2066667+00:00

I'm having the same issue. I tried to call microsoft, but the wait time was 2 hrs! The below info did not work.
Ashley Fernandes 0 Reputation points

2023-12-12T17:07:20.52+00:00

I have a user having the same issue, it's happening specifically with 3 coworkers calendars (no other users including myself having issues with those 3 coworkers disappearing from my list). We have tried the shared calendar enhancements off and on and neither seemed to make a difference.
Karen Agena 0 Reputation points

2023-12-28T22:54:39.2966667+00:00

We are having the same issue. And turning the shared calendar enhancements on/off did not work for us either.
Marcel 0 Reputation points

2024-03-06T09:01:34.7933333+00:00

I have the same problem, but only in the web client (outlook.office.com) in Firefox, Chrome and Edge
basar celiam 0 Reputation points

2024-03-25T11:48:48.7833333+00:00

Thanks bro. i have the same question
Pierre Chalfoun 0 Reputation points

2024-09-23T14:25:05.4966667+00:00

I've had this issue with one of my co-workers shared calendar. what i did was simply re-add their calendar (after a fresh restart), then delete it from my shared Calendars and re-add it. After Restarting the Shared Calendar persisted...

Usually, the calendar disappears after Outlook closes on its own and i have to re-add it everytime.

7 answers

Mikkel 50 Reputation points

2023-07-17T06:59:29.09+00:00

I'd suggest removing the checkmark from Turn on shared calendar improvements

As I've mentioned in a comment I've only ever had bad experiences with this "feature".

It gets especially bad in a hybrid Exchange environment.

I've just tested on a newly installed Win 11 PC where I had the same issue.

Shared calendar improvements was turned on by default and I was having issues adding shared calendars and keeping them added.

Turning it off has fixed the issue.
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10 people found this answer helpful.
Drew Anderson 0 Reputation points

2023-08-24T20:52:20.56+00:00

This works! Do not check the Turn on shared calendar improvements and the saved calendars appear every time.

Andy Booth 0 Reputation points

2023-10-09T16:27:05.26+00:00

This doesn't work for me, either on my laptop or my PC, but they are there on my phone

Anders E Jonsson 0 Reputation points

2023-10-19T07:17:04.14+00:00

Turning on shared calendar improvements off helped.
Thanks!

Duck IT 0 Reputation points

2024-06-11T02:03:31.4033333+00:00

THIS is the FIX. Thank you.

Bart-0945 0 Reputation points

2024-07-12T12:35:47.3866667+00:00

For me it doesn't work, I had indeed "Turn on shared calendar improvements" turned on by default on my new Win11 computer. Now it's unchecked and I reboot Outlook to apply the changes but the Shared Calendars don't reappear or stay when added again. On my old PC I also used the Outlook 365 Desk App without any issue.

All while I have the same issue like the OP: after restarting Outlook, the shared calendars always disappears from the Outlook Desktop App, so it has to be manually re-added each time Outlook is started. Weird because when using the web version of Outlook, all my shared calendars are always there just like before, so the problem seems to be limited to the (new) Desktop App.
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Faery Fu-MSFT 18,796 Reputation points Microsoft Vendor

2023-04-20T06:29:58.6033333+00:00

Hi @david-cslu , In Outlook desktop, go to File > Account Settings > Account Settings to open the Account Settings dialog. Double click on the account and click More Settings. On the Advanced tab, select the checkbox next to: Turn on shared calendar improvements. Close and restart Outlook.

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6 people found this answer helpful.
david-cslu 101 Reputation points

2023-04-24T13:24:35.4466667+00:00

Hello & thank you for your reply. That checkbox is already ticked on the computer that has the problem.

Faery Fu-MSFT 18,796 Reputation points Microsoft Vendor

2023-04-25T06:56:18.1966667+00:00

Hi @david-cslu ,
Check if the issue is caused by any other program on your computer, reboot computer with clean boot. Please refer to this article: How to perform a clean boot in Windows.

david-cslu 101 Reputation points

2023-04-27T11:23:48.0566667+00:00

Hello @Faery Fu-MSFT ; tried that now, unfortunately no change.

Faery Fu-MSFT 18,796 Reputation points Microsoft Vendor

2023-05-03T07:55:28.24+00:00

Hi @david-cslu ,

Is issue happening on all the users or one user?

Try adding the account to another computer to see if the problem persists.

david-cslu 101 Reputation points

2023-05-03T12:26:45.4433333+00:00

Hi @Faery Fu-MSFT

It happens to one user and is limited to one computer that this user uses.

Faery Fu-MSFT 18,796 Reputation points Microsoft Vendor

2023-05-18T05:29:31.5433333+00:00

Hi @david-cslu ,

Some users have reported similar problem, the solution is to create a new windows user profile, you can test to see if the problem persists.

Stephen Farkas 0 Reputation points

2023-09-01T14:15:05.8433333+00:00

Solved the problem by UNCHECKING the box, thanks for the help!

Ashley Fernandes 0 Reputation points

2023-12-12T17:08:14.3866667+00:00

same box already checked, have tried checked and unchecked and not making a difference.

Duck IT 0 Reputation points

2024-06-11T02:02:44.53+00:00

The box is a lie, UN-tick that box and all will be well
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Chew Fei Sow 0 Reputation points

2023-06-07T05:38:13.35+00:00

i have the same issue and cannot find any answer/solution. the shared calendar disappear after restarting the computer. can someone advise please?
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Aniel 0 Reputation points

2023-06-12T07:40:30.1266667+00:00

the feature: tun on shared calleder improvements was already checked.

closing outlook ad reopening outlook and all the shared callandes which were added are gone.
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Mikkel 50 Reputation points

2023-07-17T06:53:33.58+00:00

Turn off that "feature".

I've only had bad experiences with Outlook functionality when that is enabled, especially in hybrid environments.
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MattH-7532 0 Reputation points

2024-01-26T08:26:16.6933333+00:00

Shared Calendar Improvements is seemingly the problem, so it improves nothing noticeable at least.
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Shared Calendar disappears from Outlook after every restart

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