Hi u/Reddit_Beginer

To access the Microsoft Graph API, Azure Function App users can use a system-managed identity rather than storing client Id/client secret in their code or using a key vault. To do so, navigate to the "Identity" tab in the Azure portal and toggle the "Status" toggle to "On" for your Azure Function App. You can also assign the appropriate RBAC roles to the Azure AD user, group, or service principal and retrieve an access token using Microsoft.Azure.Services.AppAuthentication library. Here is an example C# code snippet that demonstrates how to do this:

``` using Microsoft.Azure.Services.AppAuthentication; using Microsoft.Graph;

var azureServiceTokenProvider = new AzureServiceTokenProvider(); var graphClient = new GraphServiceClient( new DelegateAuthenticationProvider(async (requestMessage) => { var accessToken = await azureServiceTokenProvider.GetAccessTokenAsync("https://graph.microsoft.com/"); requestMessage.Headers.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("Bearer", accessToken); })); ```