Getting graph client for unattended access

Question

Hi

I was previously using below code at the end to get graph client for unattended access. After updating to latest MS Graph I am getting the error

The type or namespace name 'DelegateAuthenticationProvider' could not be found

How can I get the unattended graph client in lates MS Graph? A short code snippet would be great.

Thanks

Regards

    `private static async Task<GraphServiceClient> GetGraphApiClient()`
`        {`

`            var clientId = "-----------------";`

`            var secret = "------------";`

`            var domain = "---------------";`

`            var credentials = new ClientCredential(clientId, secret);`

`            var authContext = new AuthenticationContext($"https://login.microsoftonline.com/{domain}/");`

`            var token = await authContext.AcquireTokenAsync("https://graph.microsoft.com/", credentials);`

`            var accessToken = token.AccessToken;`

`            var graphServiceClient = new GraphServiceClient(`

`                new DelegateAuthenticationProvider((requestMessage) =>`

`                {`

`                    requestMessage`

`                .Headers`

`                .Authorization = new AuthenticationHeaderValue("bearer", accessToken);`

`                    return Task.CompletedTask;`

`                }));`

`            return graphServiceClient;`

`        }`

Answer 1

Hi @-- --

The DelegateAuthenticationProvider class has been deprecated in the latest versions of the Microsoft Graph SDK. Instead, you can use the new authentication approach using Azure.Identity.

Furthermore, even before Graph SDK V5.0, the DelegateAuthenticationProvider class was not used to obtain the graph client for unattended access, it was a delegated class and the user had to participate in the login.

If you wish to create an unattended Graph client, please refer to the following code snippet:

using Microsoft.Graph;
using Azure.Identity;
// ...
private static async Task<GraphServiceClient> GetGraphApiClient()
{
var scopes = new[] { "https://graph.microsoft.com/.default" };
// Values from app registration
var clientId = "YOUR_CLIENT_ID";
var tenantId = "YOUR_TENANT_ID";
var clientSecret = "YOUR_CLIENT_SECRET";
// using Azure.Identity;
var options = new ClientSecretCredentialOptions
{
    AuthorityHost = AzureAuthorityHosts.AzurePublicCloud,
};
// https://learn.microsoft.com/dotnet/api/azure.identity.clientsecretcredential
var clientSecretCredential = new ClientSecretCredential(
    tenantId, clientId, clientSecret, options);
var graphServiceClient = new GraphServiceClient(clientSecretCredential, scopes);
return graphServiceClient;
}

Hope this helps.

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