Internal Server Error alway as a response for Microsoft Graph API /me/calendars endpoint

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Internal Server Error alway as a response for Microsoft Graph API /me/calendars endpoint

Stefan Colic 20

Hi everyone!

My name is Stefan Colic and i come from Doodle.

We are currently experiencing a number of exceptions coming from the /me/calendars endpoint for the Graph API. We assumed it has something to do with us, but looking at the Graph Explorer, i'm always getting 500 there as well. Screenshot 2025-06-02 at 10.47.12

The issue started on friday and intesified over the weekend. Any input on this?

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Answer 1

Fahad Gilani 320

Tas Drake found a workaround:

https://learn.microsoft.com/en-us/answers/questions/2279133/getting-500-response-errors-to-get-me-calendars-al?page=1&orderby=Helpful&comment=answer-2057015&translated=false#newest-answer-comment

Fahad Gilani 320 Reputation points

2025-06-03T02:06:28.03+00:00

Workaround seems to do the trick.
Stefan Colic 20 Reputation points

2025-06-03T14:09:31.3533333+00:00

Thank you very much! We were able to deploy the change and it works now!

Answer 2

Aashutosh Tiwari - MSFT 435 Microsoft External Staff

Hi @Stefan Colic

Thanks for posting question on Microsoft Forum,

We would like to tell you that 500 error usually occurs either due to permissions error or sometimes incorrect graph endpoint.

We would suggest you to use this graph endpoint https://graph.microsoft.com/v1.0/me/calendar via GET method and if you still want to use calendars endpoint then you need to use https://graph.microsoft.com/v1.0/me/calendars/{id}

You can go through this documentation for better understanding:
https://learn.microsoft.com/en-us/graph/api/calendar-get?view=graph-rest-1.0&tabs=http#http-request

Hope this helps.

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Stefan Colic 20 Reputation points

2025-06-02T09:25:35.88+00:00

Thanks for the reply,

I'm targeting exactly https://graph.microsoft.com/v1.0/me/calendar. But getting always 500. Nothing should be changed in permissions because nothing was really changed in the last few days.

This worked for years now, but does not work right now. People are experiencing the same issue: https://learn.microsoft.com/en-us/answers/questions/2279133/getting-500-response-errors-to-get-me-calendars-al, and there are numerous opened issues on the github where nobody responded.
Aashutosh Tiwari - MSFT 435 Reputation points Microsoft External Staff

2025-06-02T09:31:08.7966667+00:00

@Stefan Colic - Thank you for your response. We would like to suggest you raise ticket with Microsoft Calendaring Team who will investigate the issue further and find out why this API is not working. It might be due to some outage.
Aashutosh Tiwari - MSFT 435 Reputation points Microsoft External Staff

2025-06-02T09:32:45.3833333+00:00

Hope this above helps
If the answer is helpful, please click Accept Answer and kindly upvote it. If you have any further questions about this answer, please click Comment
Stefan Colic 20 Reputation points

2025-06-02T09:34:55.4433333+00:00

Can you just point me where to raise that ticket and who the Microsoft Calendaring Team is?
Aashutosh Tiwari - MSFT 435 Reputation points Microsoft External Staff

2025-06-02T09:46:16.23+00:00

You have to go to Microsoft 365 admin center and click on "Help and Support" icon and type all your description and raise ticket with this SAP Microsoft 365\Microsoft Graph\Microsoft Graph - Messages, Calendar and Contacts APIs

Hope this helps.

If the answer is helpful, please click Accept Answer and kindly upvote it. If you have any further questions about this answer, please click Comment
Aashutosh Tiwari - MSFT 435 Reputation points Microsoft External Staff

2025-06-02T12:31:32.0933333+00:00

Please click Accept Answer and kindly upvote it if you don't have any further queries. If you have any further questions about this answer, please click Comment
Aaron Johnson 10 Reputation points

2025-06-02T18:30:42.3766667+00:00

I'm over at Reclaim.ai... we're seeing the exact same thing as are our friends at Fantastical. We filed a ticket through Entrata for our app and have yet to receive a response.
Fahad Gilani 320 Reputation points

2025-06-03T01:26:19.3733333+00:00

@Aashutosh Tiwari - MSFT please you guys need to realize this is a serious outage affecting a large portion of users across every single 3rd party app and started a week ago: https://learn.microsoft.com/en-us/answers/questions/2279133/getting-500-response-errors-to-get-me-calendars-al

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Internal Server Error alway as a response for Microsoft Graph API /me/calendars endpoint

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