Hello,

You can hide the element of the edit or delete button in Resources and Categories WebCombo. Before that, you will need to get the Editing form object. Please see the snippet codes below.

        function WebScheduler1_OnInitialize(controlId)
        {
            var s = ISGetObject("WebScheduler1");
            s.ClientSideEvents.OnInitializeResources = "WebScheduler1_OnInitializeResources";
            s.ClientSideEvents.OnInitializeCategories = "WebScheduler1_OnInitializeCategories";
        }
        function WebScheduler1_OnInitializeCategories(controlId, categories)
        {
            var s = ISGetObject(controlId);
            var editWindow = s.GetEditingFormWindow();
            var wcCategories = editWindow.ISGetObject("wcCategories");
            var rows = wcCategories.GetRows();
            var categoriesHash = s.CategoriesHash;

            for (var i = 0; i < rows.length; i++)
            {
                var row = rows[i];
                var categoryID = row.Value;
                var category = categoriesHash[categoryID];
                var el = row.RowElement.cells[3];
                el.childNodes[0].style.display = "none";
                el.childNodes[2].style.display = "none";
            } 
        }
        function WebScheduler1_OnInitializeResources(controlId, resources)
        {
            var s = ISGetObject(controlId);
            var editWindow = s.GetEditingFormWindow();
            var wcResources = editWindow.ISGetObject("wcResources");
            var rows = wcResources.GetRows();
            var resourcesHash = s.ResourcesHash;

            for (var i = 0; i < rows.length; i++)
            {
                var row = rows[i];
                var resourceID = row.Value;
                var resource = resourcesHash[resourceID];
                var el = row.RowElement.cells[2];
                el.childNodes[0].style.display = "none";
                el.childNodes[2].style.display = "none";
            }
        }

Regards,
Handy

Thanks that did the trick.