List events of outlook calendar meeting room by a get request to display in a node app

Question

I want to list all the meeting in the meeting room of outlook calendar through a get request in a node application. How is it possible? I tried Microsoft graph API but I cannot get any solutions.

I have registered an app in Azure AD and generated client secret ID also and set permissions as below:

Following this tutorial , I dynamically generated access tokens and I am able to list calendars of users, post events. But I cannot get event details of any calendars although permissions are of both Calendar read and write.

I am using https://graph.microsoft.com/v1.0/users/{userId}/events to get events but I cannot access it. It gives 403 error i.e permission error but as mentioned above I think I have enough permissions to read write. I can fetch calendars using /v1.0/users/{userId}/calendars and fetch users using /v1.0/users and post events using /v1.0/users/{userId}/calendars/{calendarId}/events by passing event payload.

But I cannot get events using /v1.0/users/{userId}/events and /v1.0/users/{userId}/calendarview?startDateTime=2023-02-25T13:00:00&endDateTime=2023-02-28T23:00:00.

I am getting the following error:

 error: {
      code: 'ErrorAccessDenied',
      message: 'Access is denied. Check credentials and try again.'
    }

Answer 1

Hello @Rakshya Panta ,

Thanks for reaching out.

I am able to replicate your issue from my test tenant and I have resolved the issue with below approach:

• Try to remove & revoke Calendars.ReadBasic.All permission from the specific app and grant the other required permissions again. 
• After removing the above-mentioned permission, I am able to get all events of specific user.

Please refer to similar post:
https://learn.microsoft.com/en-us/answers/questions/1168465/get-event-using-microsoft-graph-erroraccessdenied

Hope this helps.

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Answer 2

After adding only these 2 permissions and removing and revoking all other unnecessary permissions I was able to retrieve calendar events

Answer 3

I removed and revoked all unnecessary permissions and added only two permissions:

**

then i was able to retrieve calendar events**