Microsoft Graph - Get Access Token

Question

I would like to create a backend Node.js aplication in order to manage an Outlook Calendar (Create, delete, update events...). However I want to update the same calendar every time (Always the same account). A global calendar to everyone.

The real pourpose is to integrate this calendar Backend with dialogFlow functionality (Similar to this example in Google Calendar https://github.com/dialogflow/fulfillment-bike-shop-nodejs)

I've been looking to https://docs.microsoft.com/en-us/graph/auth-v2-service, but I don't know if it is the correct aproach to do it.

I created an app in Azure Portal, and got my token:

POST https://login.microsoftonline.com/{tenant}/oauth2/v2.0/token HTTP/1.1

But can't access to https://graph.microsoft.com/v1.0/users/{id}/calendars. The message I get is similar to this:

"code": "OrganizationFromTenantGuidNotFound",
"message": "The tenant for tenant guid '68cc4dcb-5873-4ea0-a498-fe57e9b5d827' does not exist."

Answer 1

I've been looking to https://docs.microsoft.com/en-us/graph/auth-v2-service, but I don't know if it is the correct aproach to do it.

I think this is feasible.

"code": "OrganizationFromTenantGuidNotFound",

You need to use the user([email protected]) to access calendars. And this account must have been assigned a O365 license You can refer to this.

Update:

If you just want to access the calendar of your personal account, you can use auth code flow to get the access token. And then use

https://graph.microsoft.com/v1.0/me/calendars