private void AutodiscoverViewerForm_Load(object sender, EventArgs e)
        {
            this.exchangeVersionCombo.TransformComboBox(this.TempExchangeVersionCombo);
            this.exchangeVersionCombo.HasEmptyItem = true;
            this.exchangeVersionCombo.Text         = "Exchange2013";
            //this.TempExchangeVersionCombo.Text = "Exchange2007_SP1";

            AutodiscoverService oTempService = new AutodiscoverService();

            cmboUserAgent.Items.Clear();
            cmboUserAgent.Items.Add(oTempService.UserAgent);
            UserAgentHelper.AddUserAgentsToComboBox(ref cmboUserAgent);
            cmboUserAgent.Text = oTempService.UserAgent;

            rdoUseAutoDiscover.Checked        = true;
            rdoUseUserSpecifiedUrl.Checked    = false;
            txtAutodiscoverServiceURL.Enabled = false;

            txtInfo.Text      = String.Empty;
            txtInfo.BackColor = System.Drawing.SystemColors.Control;

            SetFields();

            SetEnablementOptionalHeaders();
        }