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Using Managed Identities of Azure App Service to access Graph APIs

This sample demonstrates how to use Managed Identities of Azure App Service to access Graph APIs.

How to run this sample

  1. Create an App Service for NodeJS in Azure and enable its System Assigned Managed Identity.

  2. Run the Grant-MIRole.ps1 script to grant the Managed Identity the required permissions, as in the example below:

    .\Grant-MIRole.ps1 -TenantID "your-tenant-id" -ManagedIdentityName "appservice-name" -APIPermissionName Directory.Read.All

    NOTE: you need to be a Global Administrator in the tenant to run this script.

  3. Publish the app code to the App Service via VS Code, Github Actions or via CLI from the current folder:

    az webapp up --name <appservice-name>

  4. Wait some minutes for the App Service to restart, then access the app in the browser at the URL: https://<appservice-name>.azurewebsites.net: it should display the message "Test Graph API token retrieved from Managed Identity".

  5. Open https://<appservice-name>.azurewebsites.net/token. Copy the token and decode it at jwt.io. The token should contain the required permissions to access the Graph API [= Directory.Read.All] in the "roles" claim.

  6. To test the Graph API access, open https://<appservice-name>.azurewebsites.net/users. The app should display the list of users in the tenant.