We have a web form set up to call an API on a separate server which connects to Dynamics CRM to enter a record into a custom application. About 1 out of every 10 submissions we get an error - http status code: Value cannot be null. Parameter name: identityProvider I have looked around and can not find information on this, except one article which suggested that we change the auth server in the conn string to disco.crm.dynamics.com, but tried that and that did not work. Any idea as to why this is happening and/or suggestions to fix?