Also, I double checked the certificate is valid, and redid the export to file. It was just issued. Restarted the service again.
In the Log Viewer I see this .Net exception, not sure what to do about it but maybe this helps?
Exception negotiating SSL certificate: System.NotSupportedException: The server mode SSL must use a certificate with the associated private key.
at System.Net.Security.SecureChannel.AcquireServerCredentials(Byte& thumbPrint)
at System.Net.Security.SecureChannel.GenerateToken(Byte input, Int32 offset, Int32 count, Byte& output)
at System.Net.Security.SslState.StartSendBlob(Byte incoming, Int32 count, AsyncProtocolRequest asyncRequest)
at System.Net.Security.SslState.ProcessReceivedBlob(Byte buffer, Int32 count, AsyncProtocolRequest asyncRequest)
at System.Net.Security.SslState.StartReceiveBlob(Byte buffer, AsyncProtocolRequest asyncRequest)
at System.Net.Security.SslState.ForceAuthentication(Boolean receiveFirst, Byte buffer, AsyncProtocolRequest asyncRequest)
at System.Net.Security.SslState.ProcessAuthentication(LazyAsyncResult lazyResult)
at System.Net.Security.SslStream.AuthenticateAsServer(X509Certificate serverCertificate)
at TcpServerLib.Pooled.PooledTcpItem.ConvertToSSL(IPBindingPort setting)
at TcpServerLib.Pooled.PooledTcpServer.#SBc(Socket , PooledTcpItem , IPBindingPort )