Hi, 

There are two kinds of grouping in the grid. One is OutlookGroupBy, which you are using in the screen shot here. The other refers to groups of columns. The properties you are setting here all apply to the grouping of columns, so that's why it's having no effect - it has nothing to do with OutlookGroupBy. 

If you do not want the user to be able to changing the grouping or sorting, then the easiest thing to do is to hide the GroupByBox:

        private void ultraGrid1_InitializeLayout(object sender, Infragistics.Win.UltraWinGrid.InitializeLayoutEventArgs e)
        {
            UltraGridLayout layout = e.Layout;

            layout.GroupByBox.Hidden = true;
        }

If you want to display the grouping information in the GroupByBox, but just prevent the user from changing anything, then you need to set AllowGroupBy to false. Note that this property only affects whether the user can change the grouping. It does not prevent you from grouping in code:

        private void ultraGrid1_InitializeLayout(object sender, Infragistics.Win.UltraWinGrid.InitializeLayoutEventArgs e)
        {
            UltraGridLayout layout = e.Layout;
            UltraGridBand band = layout.Bands[0];
            UltraGridOverride ov = layout.Override;

            layout.ViewStyleBand = ViewStyleBand.OutlookGroupBy;
            band.SortedColumns.Add("Int32 1", false, true);
            ov.AllowGroupBy = DefaultableBoolean.False;
        }

Also note that the user can still change the sort direction of the grouped columns. To disable that, you have to set the HeaderClickAction or cancel the BeforeSortChange event.