Issues with Graph Calling SDK(Media)

SERVER

Describe the issue
SetingMediaPlatform settings on wndows 10 server throwing unhandled exception.
See attached logs from Event Viewer, and snapshot.

Code Snippet

var settings = new MediaPlatformSettings()
            {
                ApplicationId = options.AppId,
                MediaPlatformInstanceSettings = new MediaPlatformInstanceSettings()
                {
                    InstanceInternalPort = options.InternalPort, //443
                    InstancePublicIPAddress = IPAddress.Loopback,
                    InstancePublicPort = options.PublicPort, //443
                    ServiceFqdn = options.ServiceFqdn, //public url to site
                    CertificateThumbprint = options.Thumbprint //thumbprint of wildcard certificate
                }
            };
MediaCommunicationsClientBuilderExtensions.SetMediaPlatformSettings(builder, settings);

Expected behavior
Pass setting mediaplatformsettings step

Graph SDK (please complete the following information):

• Microsoft.Bot.Builder(4.5.1)
• Microsoft.Graph (1.17)
• Microsoft.Graph.Communications.Calls (1.1.0 -prerelease.1511)
• Microsoft.Graph.Communications.Calls.Media (1.1.0 -prerelease.1511)
• Microsoft.Graph.Communications.Core.Calls (1.1.0 -prerelease.1511)
• Version [e.g. 22]

LOCAL

Also if I try run this code on local machine, this part work perfectly but then bot tries to pick up the phone, but the connection terminated shortly after (Call's state changes from Establishing to Terminated) (> Err callingService: Could not complete scenarios [create_one_to_one_call, calling_intent] because call c1a6cdbf-757f-40ba-823b-b673f1432d40 was terminated with reason: 48). See attached logs file:
logs.txt

The entry point shown is MediaCommunicationsClientBuilderExtensions.SetMediaPlatformSettings with MediaPlatformSettings; start by reviewing the attached Event Viewer screenshots and logs.txt, comparing Windows 10 Server with the local run. Done means the server accepts the settings without an unhandled exception and the call no longer transitions from Establishing to Terminated.