public static void Run()
        {
            const string      mailboxUri = "https://exchange.domain.com/ews/Exchange.asmx";
            const string      domain     = @"";
            const string      username   = @"username";
            const string      password   = @"password";
            NetworkCredential credential = new NetworkCredential(username, password, domain);

            try
            {
                // ExStart:GettingUnifiedMessagingConfigurationInformation
                IEWSClient client = EWSClient.GetEWSClient(mailboxUri, credential);
                UnifiedMessagingConfiguration umConf = client.GetUMConfiguration();
                // ExEnd:GettingUnifiedMessagingConfigurationInformation
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
            }
        }