The server may not be running in an account with identity 'host/serverName'

If you are not able to connect to the CRM Server from the different domain machine then change your code according to the below code: (changes are mentioned in bold)

public static OrganizationServiceProxy getCrmService()

{

ClientCredentials creds = new ClientCredentials();

creds.Windows.ClientCredential.UserName = ConfigurationManager.AppSettings.Get("UserName");

creds.Windows.ClientCredential.Password = ConfigurationManager.AppSettings.Get("password");

IOrganizationService OrgService = (IOrganizationService)new OrganizationServiceProxy

(new Uri(ConfigurationManager.AppSettings.Get("URL")), null, creds, null);

var osp = OrgService as OrganizationServiceProxy;

osp.ServiceConfiguration.CurrentServiceEndpoint.Behaviors.Add(new ProxyTypesBehavior());

return osp;

}

it works for me so I hope it will work for you..if any other issue please let me know