All my calendars (me/calendars) API call is returning ErrorInternalServerError (Status Code :500)

[sohimanshu]

Describe the bug
When I am trying to fetch all calendar using me/calendars API call through graph explorer then I am always getting the ErrorInternalServerError exception. Few days before It was working fine.

To Reproduce
Steps to reproduce the behavior:

1. Go to Graph Explorer
2. Click on all my calendars and use https://graph.microsoft.com/v1.0/me/calendars API call.
3. Allow all permission from Modified Permission tab
4. Click on Run Query
5. Then I received 500 ErrorInternalServerError error.

Expected behavior
I should get a list of calendars available in my account.

Screenshots

Desktop (please complete the following information):

• OS: Windows
• Browser Chrome
• Version 137.0.7151.56

Additional context
Seems like this issue is happening for newly created accounts because for my old account the calendar integration is working fine but I created a new account then I start facing this issue. Here is the email id for which i am getting this issue is himanshu.jain.testing@staticso2.com.

[sohimanshu]

Any update on this ticket as several users are facing this issue. You may track the user reported issues here https://learn.microsoft.com/en-us/answers/questions/2279133/getting-500-response-errors-to-get-me-calendars-al

[JeroenBer]

Seems to be duplicate with #3861 and #3862

[ajtruckle]

@JeroenBer It concerns me that such a critical issue is still unassigned 3 days later and has radio silence from MS.

[KaiWalter]

As this error is happening in Graph Explorer and also in my case in Microsoft Graph .NET SDK I wonder, whether this issue needs to Graph API team, if there is such.

[JeroenBer]

@KaiWalter , Yes I think it should go there to Graph API team since it's clearly a fault in the Graph API. I created a support request on the Azure Portal but no answer yet. You need a Support plan for that but I would advise everyone to try and do the same if your company has a support plan.

[KaiWalter]

Any progress for/with anyone here? I opened a support case from my Developers O365 Admin Center.

Case Number 2506081420000025

[phw198]

The accepted answer on https://learn.microsoft.com/en-us/answers/questions/2279133/getting-500-response-errors-to-get-me-calendars-al provides a workaround at least - seems to be specifically the allowedOnlineMeetingProviders and defaultOnlineMeetingProvider attributes that are causing the problem for personal accounts only, and broken as a result of shutting down Skype.

Selecting all the other properties returns as expected: https://graph.microsoft.com/v1.0/me/calendars?$select=id,name,color,changeKey,canShare,canViewPrivateItems,hexColor,canEdit,isTallyingResponses,isRemovable,owner

[KaiWalter]

The accepted answer on https://learn.microsoft.com/en-us/answers/questions/2279133/getting-500-response-errors-to-get-me-calendars-al provides a workaround at least - seems to be specifically the allowedOnlineMeetingProviders and defaultOnlineMeetingProvider attributes that are causing the problem for personal accounts only, and broken as a result of shutting down Skype.

Selecting all the other properties returns as expected: https://graph.microsoft.com/v1.0/me/calendars?$select=id,name,color,changeKey,canShare,canViewPrivateItems,hexColor,canEdit,isTallyingResponses,isRemovable,owner

Awesome! That worked for my case. Thanks!