Architecture

Here is an overall architectural diagram for the React with Fluent UI app template:

This app template has three major components:

1. Azure Storage: Host the React app with Fluent UI. The code of the React app can be found in the src folder.

2. Azure Function: Middle-tier service to call Graph. Adopted On-Behalf-Of flow. Code of the Azure Function can be found in api folder.

3. Microsoft Entra: Both Azure Storage and Azure Function are configured with Microsoft Entra app and use the Microsoft Entra app for authentication.

Authentication

Some key points in the authentication flow:

1. Get SSO token and call Azure Function with SSO token

   This app uses TeamsFx SDK to get SSO token from Microsoft 365 apps. Related code can be found in src\components\samples\AzureFunction.ts.

2. Get access token with SSO token

   This app uses createMicrosoftGraphClientWithCredential to create a graph client and will automatically request for access token with provided SSO token. Related code can be found in api\index.ts.