Microsoft Graph API 5.x Upgrade Results in Insufficient Access Privilege Error

I've been using Microsoft Graph v3 and recently decided to upgrade to the latest version, v5.x. Previously, I used the ConfidentialClientApplicationBuilder to create an IConfidentialClientApplication instance, which I passed into the ClientCredentialProvider to initialize the GraphServiceClient for querying the Graph API.

Graph V3 Code

var applicationOptions = new ConfidentialClientApplicationOptions()
{
    AadAuthorityAudience = AadAuthorityAudience.AzureAdMyOrg,
    AzureCloudInstance = AzureCloudInstance.AzurePublic,
    TenantId = Config.TenantId,
    ClientId = Config.ClientId,
    ClientSecret = Config.ClientSecret
};

var _app = ConfidentialClientApplicationBuilder.CreateWithApplicationOptions(applicationOptions).Build();

ClientCredentialProvider authProvider = new ClientCredentialProvider(_app);GraphServiceClient graphClient = new GraphServiceClient(authProvider);

var user = await graphClient.Users.Request().Select(o => new {o.Id,o.Mail}).GetAsync();

After upgrading to v5, I noticed there are several new ways to authenticate. I opted to use the ClientSecretCredential, as it seemed similar and allowed me to reuse the same credentials.

var scopes = new[] { "https://graph.microsoft.com/.default" };

var clientId = "ClientID";
var tenantId = "TenantID";
var clientSecret = "ClientSecret";

var options = new ClientSecretCredentialOptions
{
    AuthorityHost = AzureAuthorityHosts.AzurePublicCloud,
};

var clientSecretCredential = new ClientSecretCredential(
    tenantId, clientId, clientSecret, options);

var graphClient = new GraphServiceClient(clientSecretCredential, scopes);
var requestBody = new User
{
    BusinessPhones = new List<string>
    {
        "12342232132",
    }
};
var result = await graphClient.Users["UserID"].PatchAsync(requestBody);

However, I'm now encountering an Insufficient privileges to complete the operation error. I'm unsure if this is due to missing scope permissions or some other issue. but I tried to add the necessary permissions, but the error persists.

Note: I am using the admin account

Thanks

Note that: As you are making use of client credential flow, you need to grant application type API permissions to the Microsoft Entra ID application.

• Client credential flow is a non-user interactive flow.

To update the user properties, you need to grant User.ReadWrite.All application type API permission:

And assign administrator role to the Microsoft Entra ID application as mentioned in this MsDoc

I assigned User administrator active role to the Microsoft Entra ID application:

I am able to successfully update the business phone of the user:

using Azure.Identity;
using Microsoft.Graph;
using Microsoft.Graph.Models;
using Microsoft.Graph.Models.ODataErrors;

namespace GraphApiExample
{
    class Program
    {
        private static async Task Main(string[] args)
        {
            var scopes = new[] { "https://graph.microsoft.com/.default" };
            var clientId = "ClientID";
            var tenantId = "TenantID";
            var clientSecret = "Secret";

            var options = new ClientSecretCredentialOptions
            {
                AuthorityHost = AzureAuthorityHosts.AzurePublicCloud,
            };

            var clientSecretCredential = new ClientSecretCredential(tenantId, clientId, clientSecret, options);
            var graphClient = new GraphServiceClient(clientSecretCredential, scopes);

            var requestBody = new User
            {
                BusinessPhones = new List<string>
                {
                    "12342232132",
                }
            };

            try
            {
                var userId = "UserID";
                var result = await graphClient.Users[userId].PatchAsync(requestBody);
                Console.WriteLine($"Updated user's phone number");
            }
            catch (ODataError odataError)
            {
                Console.WriteLine(odataError.Error?.Code);
                Console.WriteLine(odataError.Error?.Message);
                throw;
            }
        }
    }
}

• The Microsoft Entra ID application must be having higher privileged role than the user.
• For sample, if you are trying to update Global Admin user property then the application must be assigned Global Admin role.

Reference:

Update user - Microsoft Graph v1.0 | Microsoft