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Dynamics 365 Community / Forums / Customer experience | Sales, Customer Insights,... / businesscentral.dynamics
Customer experience | Sales, Customer Insights,...
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businesscentral.dynamics

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Posted on by KT-04081410-0
My main question is I'm in the process of creating a 3rd party app and trying to request an access token using a http request. I went thru Azure and created an APP and got a client_id and client_secret. I first tried this in Postman using https://businesscentral.dynamics.com/ as the URL and it worked returning an access token.
 
I then create a small Visual Studio C# and re-tried (local debug) using the same setup as in Postman.
 
My http request keeps returning a 'The remote server returned an error: (401) Unauthorized'
so my thought is that I need to authorize the 3rd party app before it lets me get an access token.
 
I assume Postman is already authorized so that's why it works.
 
Can someone tell me if I'm correct and what my next step is.
 
Thanks Keith
  • KT-04081410-0 Profile Picture
    KT-04081410-0 on at
    businesscentral.dynamics
    I am a Global Administrator but when I tried to authorize API's to read-write-all for Dynamics ERP,Dynamics 365 Business Central I get the following error message, since I just have a trial subscription, is this message caused by the trial subscription or possibly something else?
     
    Message:
    Could not grant admin consent. Your organization does not have a subscription (or service principal) for the following API(s): Dynamics ERP,Dynamics 365 Business Central
     
    What should I do next?
     
    Thanks
    Keith
     
  • CU26071644-0 Profile Picture
    CU26071644-0 on at
    businesscentral.dynamics
    Thanks for the reply..
     
    I still get the (401) Unauthorized , so my next question is
     
    Do I need to add or change any setting or privileges in Azure to run a Web API?
  • Pradeep Rai Profile Picture
    Pradeep Rai 5,482 Super User 2025 Season 1 on at
    businesscentral.dynamics
    You need to try but based on my searching it seems that you can access the API no need to purchase.

    Thank You,
    Pradeep rai.
  • KT-04081410-0 Profile Picture
    KT-04081410-0 on at
    businesscentral.dynamics
    Thanks for the reply
     
    One other question I only have a free account at the moment do I need to get a pay account before getting the ability to get an access token and read various entities with the web api?
  • Suggested answer
    Pradeep Rai Profile Picture
    Pradeep Rai 5,482 Super User 2025 Season 1 on at
    businesscentral.dynamics
    Hi,

    try below code to generate access token:
      
    

namespace CRM.Pradeep
{
    public class BusinessCentralCRM: IPlugin
    {
        public void Execute(IServiceProvider serviceProvider)
        {
            // Obtain the tracing service
            ITracingService tracingService = (ITracingService)serviceProvider.GetService(typeof(ITracingService));

            // Authenticate with Business Central
            Task<string> accessTokenTask = AuthenticateWithBusinessCentral(tracingService);
            accessTokenTask.Wait();
            string accessToken = accessTokenTask.Result;

          

            
        }

        private async Task<string> AuthenticateWithBusinessCentral(ITracingService tracingService)
        {
            try
            {
                string tenantId = "your_tenant_id";
                string clientId = "your_client_id";
                string clientSecret = "your_client_secret";
                string resource = "https://api.businesscentral.dynamics.com";

                string tokenEndpoint = $"https://login.microsoftonline.com/{tenantId}/oauth2/token";

                using (HttpClient client = new HttpClient())
                {
                    var content = new StringContent($"grant_type=client_credentials&client_id={clientId}&client_secret={Uri.EscapeDataString(clientSecret)}&resource={Uri.EscapeDataString(resource)}", Encoding.UTF8, "application/x-www-form-urlencoded");

                    HttpResponseMessage response = await client.PostAsync(tokenEndpoint, content);

                    if (response.IsSuccessStatusCode)
                    {
                        string responseContent = await response.Content.ReadAsStringAsync();
                        return responseContent;
                    }
                    else
                    {
                        tracingService.Trace($"Error: {response.StatusCode}");
                        return null;
                    }
                }
            }
            catch (Exception ex)
            {
                tracingService.Trace($"Exception: {ex.Message}");
                return null;
            }
        }
    }
}
     

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