Shared personal calendars not displaying in Microsoft Outlook

Question

Shared personal calendars not displaying in Microsoft Outlook

Robert Vilhelmsen 1

We are using Microsoft Outlook version 16.0.16827.20278 with Microsoft 365, but shared personal calendars are not displaying correctly. Other users' calendars show up as blank with a spinning wheel. I have tried various solutions like deleting and re-adding calendars, disabling the Outlook cache, and enabling/disabling the "Improved shared calendars experience" feature, but none of them have worked. However, using OWA shows the shared personal calendars correctly. Any suggestions on how to fix this issue?

/Robert

ChristyZhang-MSFT 26,126 Reputation points Microsoft External Staff

2023-11-17T02:11:25.85+00:00

Hi @Robert Vilhelmsen ,

Welcome to our forum!

Other users' calendars show up as blank with a spinning wheel.

Do you mean that you didn't add the shared calendar successfully? Or you have added the shared calendar but the calendar is empty?
Robert Vilhelmsen 1 Reputation point

2023-11-17T06:09:58.53+00:00

Hi @ChristyZhang-MSFT

Sorry, let me clarity. We can add the shared calender with success, but the calender is empty.

I don´t know when this started as many of us already had personal shared calenders added and was shown with congent withpout issues, but at some point the calenders sare empty.

Again same thing via OWA works so this must be related to Outlook on Windows client.
Deleted

This comment has been deleted due to a violation of our Code of Conduct. The comment was manually reported or identified through automated detection before action was taken. Please refer to our Code of Conduct for more information.

Robert Vilhelmsen 1

Hi @ChristyZhang-MSFT

Sniffing the traffic is see successfull access to the api, but ends up with a exception error:

Microsoft.Exchange.Data.StoreObjects.DefaultFolders.Exceptions.DefaultFolderNotFoundException: Default folder Calendar not found.

"Name": "RenmoteUser domain",
  "Color": "Auto",
  "HexColor": "",
  "IsDefaultCalendar": false,
  "ChangeKey": "Se2nTr1l9kaRXht3E+alKgAJApYseQ==",
  "CanShare": false,
  "CanViewPrivateItems": null,
  "CanManageCategories": false,
  "CanEdit": null,
  "CalendarGroupId": null,
  "AllowedOnlineMeetingProviders": [],
  "DefaultOnlineMeetingProvider": "Unknown",
  "IsTallyingResponses": null,
  "IsRemovable": true,
  "DataSource": "Remote",
  "Owner": {
    "Name": "RenmoteUser",
    "Address": "******@domain.dk"

"Name": "RenmoteUser domain",
		  "Color": "Auto",
		  "HexColor": "",
		  "IsDefaultCalendar": false,
		  "CanShare": false,
		  "CanViewPrivateItems": null,
		  "CanManageCategories": false,
		  "IsShared": false,
		  "IsSharedWithMe": true,
		  "CanEdit": null,
		  "LocalFolderId": null,
		  "AllowedOnlineMeetingProviders": [],
		  "DefaultOnlineMeetingProvider": "Unknown",
		  "IsTallyingResponses": null,
		  "IsRemovable": true,
		  "DisplayOrder": "7F",
		  "DataSource": "Remote",
		  "WorkingHours": null,
		  "Owner": {
			"Name": "RenmoteUser",
			"Address": "******@domain.dk"

Microsoft.Exchange.Data.StoreObjects.DefaultFolders.Exceptions.DefaultFolderNotFoundException: Default folder Calendar not found.
 ---> Microsoft.Mapi.MapiExceptionNotFound: MapiExceptionNotFound: Unable to get properties on object. (hr=0x8004010f, ec=-2147221233)

ChristyZhang-MSFT 26,126 Reputation points Microsoft External Staff

2023-11-21T08:52:18.1466667+00:00

Hi @Robert Vilhelmsen ,

Thanks for your reply!

According to your description, i notice that the shared calendars of personal mailbox shown empty in Outlook desktop client, right?

If so, does this issue occur with the specific shared calendar? And can the same calendar be opened successfully with other users who has permission to access?

In addition, how did you add the shared calendar in Outlook client? It's suggested that you could refer to this article to check if you add the calendar correctly: Open another person's Exchange Calendar.
Robert Vilhelmsen 1 Reputation point

2023-11-21T11:09:50+00:00

@ChristyZhang-MSFT

According to your description, i notice that the shared calendars of personal mailbox shown empty in Outlook desktop client, right?

Correct

If so, does this issue occur with the specific shared calendar? And can the same calendar be opened successfully with other users who has permission to access?

No one can access shared calenders from desktop Outloook client. This issue is for all users to all shared calenders. And again, it works with OWA so it´s not a permission issue.

I think the issue is this exception the API/server throws:

Microsoft.Exchange.Data.StoreObjects.DefaultFolders.Exceptions.DefaultFolderNotFoundException: Default folder Calendar not found.

Why does the API https://outlook.office.com/api/v2.0/ throw this error?

1 answer

Your answer

ChristyZhang-MSFT 26,126 Reputation points Microsoft External Staff

2023-11-17T02:11:25.85+00:00

Hi @Robert Vilhelmsen ,

Welcome to our forum!

Other users' calendars show up as blank with a spinning wheel.

Do you mean that you didn't add the shared calendar successfully? Or you have added the shared calendar but the calendar is empty?
Robert Vilhelmsen 1 Reputation point

2023-11-17T06:09:58.53+00:00

Hi @ChristyZhang-MSFT

Sorry, let me clarity. We can add the shared calender with success, but the calender is empty.

I don´t know when this started as many of us already had personal shared calenders added and was shown with congent withpout issues, but at some point the calenders sare empty.

Again same thing via OWA works so this must be related to Outlook on Windows client.
Deleted

This comment has been deleted due to a violation of our Code of Conduct. The comment was manually reported or identified through automated detection before action was taken. Please refer to our Code of Conduct for more information.
Robert Vilhelmsen 1 Reputation point

2023-11-20T10:54:38.1+00:00

Hi @ChristyZhang-MSFT

Sniffing the traffic is see successfull access to the api, but ends up with a exception error:

Microsoft.Exchange.Data.StoreObjects.DefaultFolders.Exceptions.DefaultFolderNotFoundException: Default folder Calendar not found.

"Name": "RenmoteUser domain", "Color": "Auto", "HexColor": "", "IsDefaultCalendar": false, "ChangeKey": "Se2nTr1l9kaRXht3E+alKgAJApYseQ==", "CanShare": false, "CanViewPrivateItems": null, "CanManageCategories": false, "CanEdit": null, "CalendarGroupId": null, "AllowedOnlineMeetingProviders": [], "DefaultOnlineMeetingProvider": "Unknown", "IsTallyingResponses": null, "IsRemovable": true, "DataSource": "Remote", "Owner": { "Name": "RenmoteUser", "Address": "******@domain.dk"

"Name": "RenmoteUser domain", "Color": "Auto", "HexColor": "", "IsDefaultCalendar": false, "CanShare": false, "CanViewPrivateItems": null, "CanManageCategories": false, "IsShared": false, "IsSharedWithMe": true, "CanEdit": null, "LocalFolderId": null, "AllowedOnlineMeetingProviders": [], "DefaultOnlineMeetingProvider": "Unknown", "IsTallyingResponses": null, "IsRemovable": true, "DisplayOrder": "7F", "DataSource": "Remote", "WorkingHours": null, "Owner": { "Name": "RenmoteUser", "Address": "******@domain.dk" Microsoft.Exchange.Data.StoreObjects.DefaultFolders.Exceptions.DefaultFolderNotFoundException: Default folder Calendar not found. ---> Microsoft.Mapi.MapiExceptionNotFound: MapiExceptionNotFound: Unable to get properties on object. (hr=0x8004010f, ec=-2147221233)
ChristyZhang-MSFT 26,126 Reputation points Microsoft External Staff

2023-11-21T08:52:18.1466667+00:00

Hi @Robert Vilhelmsen ,

Thanks for your reply!

According to your description, i notice that the shared calendars of personal mailbox shown empty in Outlook desktop client, right?

If so, does this issue occur with the specific shared calendar? And can the same calendar be opened successfully with other users who has permission to access?

In addition, how did you add the shared calendar in Outlook client? It's suggested that you could refer to this article to check if you add the calendar correctly: Open another person's Exchange Calendar.
Robert Vilhelmsen 1 Reputation point

2023-11-21T11:09:50+00:00

@ChristyZhang-MSFT

According to your description, i notice that the shared calendars of personal mailbox shown empty in Outlook desktop client, right?

Correct

If so, does this issue occur with the specific shared calendar? And can the same calendar be opened successfully with other users who has permission to access?

No one can access shared calenders from desktop Outloook client. This issue is for all users to all shared calenders. And again, it works with OWA so it´s not a permission issue.

I think the issue is this exception the API/server throws:

Microsoft.Exchange.Data.StoreObjects.DefaultFolders.Exceptions.DefaultFolderNotFoundException: Default folder Calendar not found.

Why does the API https://outlook.office.com/api/v2.0/ throw this error?

Answer 1

ChristyZhang-MSFT 26,126 Microsoft External Staff

Hi @Robert Vilhelmsen ,

Thanks for your reply!

Does this issue occur recently? If so, have you done any specific operations before that?

I notice that the issue occurs in Outlook desktop client, considering the impact of some add ins, it is suggested that you try to start outlook in safe mode(win+R>type: outlook /safe) to check whether it works normally.

If the issue persists, in order to further confirm the issue, it's suggested that you could try to roll back office to the previous version to check if the issue persists.

In addition, according to the information you provided, do you have the relevant logs with the help of some analysis tools? If yes, sorry because of the limitations of the forum support, we don't read the logs, and recommend that you could contact phone support directly for more professional and convenient advice. Thanks for your kindly understanding and support!

If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".

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Robert Vilhelmsen 1 Reputation point

2023-11-24T08:41:14.8666667+00:00

@ChristyZhang-MSFT

I uninstalled Version 2309 Build 16.0.16827.20278 and installed Version 2310 (Build 16924.20150). After this shared calender works again.

Then i uninstalled Build 16924.20150 and reinstalled Build 16.0.16827.20278 and it still works - for some time. After 30-60 minuttes it happens again. Maybe it´s some gpo settings i have to look through.
ChristyZhang-MSFT 26,126 Reputation points Microsoft External Staff

2023-11-27T08:59:32.1466667+00:00

Hi @Robert Vilhelmsen ,

Thanks for your reply!

I understand that after you reinstalled Outlook, the issue disappeared for a while. As i mentioned above, considering the impact of some add ins, it is suggested that you try to start outlook in safe mode(win+R>type: outlook /safe) to check whether it works normally.

If the issue persists, it is suggested that you could try to create a new profile(Control Panel>Mail>Show Profiles>add) and add the account for testing to check if there are some differences.

If the above doesn't help, considering the impact of some third-party programs on your computer, please try to perform a clean boot for windows and check if the issue still occurs.

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Shared personal calendars not displaying in Microsoft Outlook

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