Unable to Login to Dynamics CRM online via a Console application

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Posted on by SCV

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Hi,

I am trying to connect to Dynamics CRM Online via a console application. I manged to connect successfully when I use the service account. But if I use any other user I get the following error as the last CRM error in conn object; so the orgService is null: (these users can login to CRM and do their work.)

Unable to Login to Dynamics CRMOrganizationWebProxyClient is nullOrganizationServiceProxy is nullOrganizationServiceProxy is nullOrganizationServiceProxy is nullOrganizationWebProxyClient is nullOrganizationServiceProxy is nullOrganizationWebProxyClient is nullOrganizationServiceProxy is null

Here is my code:

private static string connectionString = "Url=orgname.crm6.dynamics.com; Username=username@example.com; Password=password; authtype=Office365";

ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;
            
CrmServiceClient conn = new Microsoft.Xrm.Tooling.Connector.CrmServiceClient(connectionString);


IOrganizationService orgService = (IOrganizationService)conn.OrganizationWebProxyClient != null ? (IOrganizationService)conn.OrganizationWebProxyClient : (IOrganizationService)conn.OrganizationServiceProxy;

I have tried using the organization unique name instead of org name in the connection string as suggested here:

http://missdynamicscrm.blogspot.in/2017/02/error-unable-to-login-to-dynamics.html

and also this one:

https://www.solzit.com/resolve-error-unable-login-dynamics-crmorganizationwebproxyclient-null-crm-online/

Nothing works.

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Suggested answer

Aric Levin - MVP 30,190 Moderator on at

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Can you try and check if the following works?

using Microsoft.Xrm.Tooling.Connector;

string userName = ConfigurationManager.AppSettings["UserName"].ToString();

string password = "password"

string internalUrl = ConfigurationManager.AppSettings["InternalUrl"].ToString();

string orgName = ConfigurationManager.AppSettings["OrgName"].ToString();

NetworkCredential creds = new NetworkCredential(userName, ConvertToSecureString(password));

ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;

// Next two lines use Microsoft.Xrm.Tooling.Connector namespace;

AuthenticationType authType = AuthenticationType.Office365;

conn = new CrmServiceClient(userName, ConvertToSecureString(CRM_PASSWORD), "NorthAmerica", orgName, isOffice365: true);

if (conn.IsReady)

{

_orgService = (IOrganizationService)conn.OrganizationWebProxyClient != null ? (IOrganizationService)conn.OrganizationWebProxyClient : (IOrganizationService)conn.OrganizationServiceProxy;

}

Not sure if this will resolve your issue, but I had issues in the past with connection string as well.

Hope this helps.

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Verified answer

JohnAnonymous 5,241 on at

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Maybe it is due to CRM forcing you to use TLS 1.2? I had the same error using an Azure Function and forcing TLS 1.2 solved it for me.

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Friyank 944 on at

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This is because,

CRM 365 9.0 connection is only possible using TLS 1.2

Hope this blog here helps you

coderscollection.wordpress.com/.../607

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Justinjose 2,707 on at

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Hi SCV,

I am not sure tried this or not.

Known Issue with Visual Studio 2015

When you are running your project/solution in VS 2015 in debug mode, there is a known issue where you may not be able to connect to Dynamics 365 (online), version 9.0. This happens regardless of whether you are using a Target Framework of 4.6.2 or higher. This can occur because the Visual Studio hosting process is compiled against .NET 4.5 which means by default it does not support TLS 1.2. You can disable the Visual Studio hosting process as a work around. Right-click on the name of your project in Visual Studio and then click Properties. On the Debug tab you can uncheck the Enable the Visual Studio hosting process option.

Please Note: This only impacts the debug experience in VS 2015. This does not impact the binaries or executable that are built. The same issue does not occur in Visual Studio 2017.

Thanks

Justin Jose

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Nishant Rana 11,325 Microsoft Employee on at

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We were also getting the same error - this helped

nishantrana.me/.../

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Vipin J 1,603 on at

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Here is a quick solution

https://vjcity.blogspot.com/2021/10/unable-to-login-to-dynamics.html

https://vjcity.blogspot.com/2021/07/assembly-microsoftcrmsdkproxy-with.html

Here is a complete Step by Step approach to connect to D365 CRM

https://vjcity.blogspot.com/2021/12/connect-to-dynamic-365-crm-from-console.html

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