Cannot connect my console app to my dynamics 365 sales instance

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Posted on by Prithvi647

Hello everyone,

I am new to dynamics 365 and I have recently tried to develop a console job to manipulate opportunities on dynamics 365 platform, however, I am not able to connect.

It gives me this error when I run the app:

An unsecured or incorrectly secured fault was received from the other party. See the inner FaultException for the fault code and detail.

Part of the code for connection:

IOrganizationService service;

ClientCredentials credentials = new ClientCredentials();
credentials.UserName.UserName = "****@******onmicrosoft.com";
credentials.UserName.Password = "*************";

ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;

service = new OrganizationServiceProxy(new Uri("https://**************************************.svc"), null, credentials, null);

if(service != null)
{

Guid userID = ((WhoAmIResponse)service.Execute(new WhoAmIRequest())).UserId;

if(userID != Guid.Empty)
{
Console.WriteLine("Connection successful");
}

}

else
{
Console.WriteLine("FAILED");
}

Here is a screenshot

I have tried adjusting the time zone and updating the NuGet packages but the error persists.

Thanks.

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Verified answer

Clofly 260 on at

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Hi Prithvi647,

The class ClientCredentials you are using is deprecated to connect to Dynamics 365.(It is WS-Trust authentication method.)

Instead, the current class we should use is CrmServiceClient.(Office 365 authentication method.)

Here is an article about introduction to the new connection method.

https://xrmdynamicscrm.wordpress.com/2020/09/11/office365-authentication-type-and-organizationserviceproxy-class-for-connecting-to-common-data-service-deprecated/

Firstly, we need to register an Azure AD app and grant its access to Dynamics CRM, you can follow this tutorial to set up the app.

https://carldesouza.com/calling-the-power-apps-and-dynamics-365-web-api-from-the-postman-windows-client/

Please refer to my code, we use connection string to connect to D365.

(AppId is our Azure AD app. and I added a custom redirect URL.)

static void Main(string[] args) { try { string ConnectionString = "AuthType = OAuth; " "Username = admin@crm123456.onmicrosoft.com;" "Password = 123456; " "Url = https://org123456.crm5.dynamics.com;" "AppId=xxxxxxxx-b283-4644-8a7f-b72d0bffc9e0;" "RedirectUri=https://asyouwish;" "LoginPrompt=Auto"; Console.WriteLine("Waiting for connection..."); CrmServiceClient svc = new CrmServiceClient(ConnectionString); if (svc.IsReady) { Console.WriteLine("Ready!"); IOrganizationService orgService; orgService = (IOrganizationService)svc.OrganizationWebProxyClient != null ? (IOrganizationService)svc.OrganizationWebProxyClient : (IOrganizationService)svc.OrganizationServiceProxy; Guid userID = ((WhoAmIResponse)orgService.Execute(new WhoAmIRequest())).UserId; if (userID != Guid.Empty) { Console.WriteLine("Connection successful" "Your GUID is: " userID); } } } catch (Exception ex) { Console.WriteLine(ex.ToString()); } Console.ReadLine(); }

Run the code to test

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Prithvi647 5 on at

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Thank you you solution worked great.

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Clofly 260 on at

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Hi Prithvi647,

It is very glad that the solution works for you.

If you had found any answer helped, please kindly mark it as verified to close the thread, which would help community users who have similar question, thanks. :)

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cloflyMao 25,210 on at

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Hi Prithvi647,

Please ignore this reply.

Clofly 2 Mao is my backup account, there is issue with my main account in recent days, now the issue is fixed, this is just a simple reply from my main account.

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