What happens if I don't use TLS12 to get organizational services for dynamics crm 9.0

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Posted on by Stone Huang

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Hi Guys,

I'm using the code below to get organization service, it can get service, but now it sometimes show "System.ServiceModel.CommunicationException: The underlying connection was closed: A connection that was expected to be kept alive was closed by the server." when I invoke this service. I'm not sure if it's because I didn't explicitly use TLS1.2(ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12; ).

I'm using Dynamics crm 9.0 on-premise version.

Thanks,

Dejun

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RE: What happens if I don't use TLS12 to get organizational services for dynamics crm 9.0

System.Net.ServicePointManager.ServerCertificateValidationCallback = delegate (object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors) { return true; };

_service = (IOrganizationService)new OrganizationServiceProxy(new Uri(ConfigurationManager.AppSettings["CRMUrl"]),

null, _clientCredentials, null);

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