I'm trying to build a small application that can retrieve a particular user's calendar events without a signed in user, that is to utilize the application permissions in Graph API and query the events by authenticating with App ID, Tenant ID and Secret values. I was able to follow this documentation https://docs.microsoft.com/en-us/graph/auth-v2-service and generate JWT tokens to query the graph API. And it worked fine when i tried to retrieve all the users information, or even retrieve a particular users information using the following paths.
/users
/users/{id | userPrincipalName}
Both the above endpoints worked fine and i was able to retrieve details, but when i tried to access the calendar events of a particular user using the following Graph API path
/users/{id | userPrincipalName}/events
I get the following error,
I'm not sure what i'm doing wrong here, i have the following Application permissions set up in Azure AD Portal and the permissions are reflected in the JWT token.
I feel like the token generation part is working fine since the first two Graph API endpoints i mentioned above are functional, but I'm not sure where else I'm going wrong and as to why I'm not able to retrieve a particular user's calendar events. Any help would be much appreciated.