Metadata contains a reference that cannot be resolved: ‘https://orgname.crm8.dynamics.com/XRMServices/2011/Organization.svc?wsdl&sdkversion=9’ error in Dynamics 365

 We would run into this issue while trying to connect to Dynamics 365 Version 9.0 from a client application.

It is because Customer Engagement Platform (version 9.0) only supports TLS 1.2.

More details here

https://blogs.msdn.microsoft.com/crm/2017/09/28/updates-coming-to-dynamics-365-customer-engagement-connection-security/

How we can fix it à

We need to add the following line of code to our existing code

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public static OrganizationServiceProxy GetOrganizationServiceProxy() { ClientCredentials clientCredentials = new ClientCredentials();   clientCredentials.UserName.UserName = "username"; clientCredentials.UserName.Password = "password";   // Set security protocol to TLS 1.2 for version 9.0 of Customer Engagement Platform ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;   return new OrganizationServiceProxy(new Uri("https://orgname.crm.dynamics.com/XRMServices/2011/Organization.svc"), null, clientCredentials, null); }

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