diff --git a/ucs-4.0-1/management/univention-management-console-module-udm/umc/js/udm/DetailPage.js b/ucs-4.0-1/management/univention-management-console-module-udm/umc/js/udm/DetailPage.js
index f4ce937..63ed9a5 100644
--- a/ucs-4.0-1/management/univention-management-console-module-udm/umc/js/udm/DetailPage.js
+++ b/ucs-4.0-1/management/univention-management-console-module-udm/umc/js/udm/DetailPage.js
@@ -382,13 +382,13 @@ define([
 			this._form.ready().then(lang.hitch(this, function() {
 				var valuesChanged = this.haveValuesChanged() || this.havePolicyReferencesChanged();
 				if (valuesChanged) {
-					var changes = '\n<ul>';
+					var changes = [];
 					tools.forIn(this.getAlteredValues(), lang.hitch(this, function(key, value) {
 						if (key === '$dn$') {
 							return;
 						}
 						var widget = this._form.getWidget(key);
-						if (widget) {
+						if (widget && widget.get('visible')) {
 							value = widget.get('value');
 							if (value instanceof Array) {
 								value = value.join(', ');
@@ -400,15 +400,18 @@ define([
 									}
 								});
 							}
-							changes += lang.replace('<li>{tabName}{groupName} - {widgetName}: {value}</li>', {
+							changes.push(lang.replace('<li>{tabName}{groupName} - {widgetName}: {value}</li>', {
 								tabName: widget.$refTab$ ? widget.$refTab$.label: '',
 								groupName: widget.$refTitlePane$ ? ' - ' + widget.$refTitlePane$.label: '',
 								widgetName: widget.get('label') || key,
-								value: value});
+								value: value
+							}));
 						}
 					}));
-					changes += '</ul>';
-					dialog.alert(_('The following empty properties were set to default values in the form. These values will be applied when saving.') + changes);
+					if (changes.length) {
+						changes = '\n<ul>' + changes.join('') + '</ul>';
+						dialog.alert(_('The following empty properties were set to default values in the form. These values will be applied when saving.') + changes);
+					}
 				}
 			}));
 		},