title: Unable to connect to Azure Cosmos DB using the MongoDB Driver .Net C#
body: <p>We cannot connect to Cosmos DB using the MongoDB driver when we deploy our application to a test server.</p>
  
  <p>All our Dev machines have no issue but we are getting the following from test.
  I get thats its an issue with a cert on the Machine but how do we fix it ?</p>
  
  <pre><code> [{ ServerId: "{ ClusterId : 1, EndPoint : 
  "Unspecified/xxxxxxxxx.documents.azure.com:10255" }",
   EndPoint: "Unspecified/xxxxxxxx.documents.azure.com:10255", State: 
   "Disconnected", Type: "Unknown", HeartbeatException: 
   "MongoDB.Driver.MongoConnectionException: 
  An exception occurred while opening a connection to the server. ---&gt; 
   System.Security.Authentication.AuthenticationException: 
   The remote certificate is invalid according to the validation procedure. 
  </code></pre>
  
  <p>is the issue here the client cert being invalid ? </p>
  
  <p>We have connections to Azure SQL instances without any issues.</p>