Consume Dynamics 365 Web API using MSAL.NET

Sharing a sample code to consume Dynamics 365 Web API using MSAL.NET

Create a console application and add the following NuGet Package

• Microsoft.Identity.Client
  

More on Microsoft identity platform

https://docs.microsoft.com/en-us/azure/active-directory/develop/

We are using ConfidentialClientApplicationBuilder create method.

https://docs.microsoft.com/en-gb/azure/active-directory/develop/msal-net-initializing-client-applications

The sample code –

using Microsoft.Identity.Client;
using System;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Threading.Tasks; namespace CrmAppMSAL
{
class Program
{
static async Task Main(string[] args)
{ string clientId = "fc34502a-74db-4977-8c83-***********";
string secret = "5~mByJeQ8dDO2LZP_H_J2**********";
string[] scope = new string[] { "https://orgname.crm15.dynamics.com/.default" };
string webAPI = "https://[org].crm15.dynamics.com//api/data/v9.0/leads";
string authority = "https://login.microsoftonline.com/7bc93881-0733-48ab-baa1-ee3ed7717633"; var clientApp = ConfidentialClientApplicationBuilder.Create(clientId: clientId)
.WithClientSecret(clientSecret: secret)
.WithAuthority(new Uri(authority))
.Build(); try
{
AuthenticationResult authResult = await clientApp.AcquireTokenForClient(scope).ExecuteAsync(); var httpClient = new HttpClient();
httpClient.DefaultRequestHeaders.Add("OData-MaxVersion", "4.0");
httpClient.DefaultRequestHeaders.Add("OData-Version", "4.0");
httpClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", authResult.AccessToken); httpClient.BaseAddress = new Uri(webAPI); var response = httpClient.GetAsync("WhoAmI").Result; if (response.IsSuccessStatusCode)
{
var userDetails = response.Content.ReadAsStringAsync().Result;
Console.WriteLine(userDetails);
Console.WriteLine(authResult.AccessToken);
Console.WriteLine(authResult.ExpiresOn);
Console.ReadLine();
} }
catch (Exception ex)
{
string errorMessage = ex.Message;
}
}
}
}

Result –


Reference –

https://medium.com/capgemini-microsoft-team/access-tokens-for-dynamics-365-using-microsoft-authentication-library-2b16c9f794b

Hope it helps..