diff --git a/2025-11-13 11_35_00-Clipboard.png b/2025-11-13 11_35_00-Clipboard.png
deleted file mode 100644
index 2cf55a5..0000000
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diff --git a/2025-11-13 14_52_24-.png b/2025-11-13 14_52_24-.png
new file mode 100644
index 0000000..ea7984c
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diff --git a/FasdDesktopUi/Basics/UserControls/ComboBoxPageable.xaml b/FasdDesktopUi/Basics/UserControls/ComboBoxPageable.xaml
index 3a05738..55280b7 100644
--- a/FasdDesktopUi/Basics/UserControls/ComboBoxPageable.xaml
+++ b/FasdDesktopUi/Basics/UserControls/ComboBoxPageable.xaml
@@ -199,14 +199,15 @@
     </UserControl.Resources>
 
     <Grid>
-        <ComboBox x:Name="ComboBoxControl"
-                  DropDownOpened="ComboBoxControl_DropDownOpened"
-                  DropDownClosed="ComboBoxControl_DropDownClosed"
-                  Background="{Binding ElementName=ComboBoxPagableUc, Path=ComboBoxBackground}"
-                  BorderBrush="{Binding ElementName=ComboBoxPagableUc, Path=BorderBrush}"
-                  ItemsSource="{Binding ElementName=ComboBoxPagableUc, Path=ItemData}"
-                  SelectedItem="{Binding RelativeSource={RelativeSource AncestorType={x:Type local:ComboBoxPageable}}, Path=SelectedItem, Mode=TwoWay}"
-                  DisplayMemberPath="Key"
-                  Template="{StaticResource ComboBoxPagableTemplate}" />
-    </Grid>
+        <ComboBox x:Name="ComboBoxControl"
+                  DropDownOpened="ComboBoxControl_DropDownOpened"
+                  DropDownClosed="ComboBoxControl_DropDownClosed"
+                  Background="{Binding ElementName=ComboBoxPagableUc, Path=ComboBoxBackground}"
+                  BorderBrush="{Binding ElementName=ComboBoxPagableUc, Path=BorderBrush}"
+                  BorderThickness="0"
+                  ItemsSource="{Binding ElementName=ComboBoxPagableUc, Path=ItemData}"
+                  SelectedItem="{Binding RelativeSource={RelativeSource AncestorType={x:Type local:ComboBoxPageable}}, Path=SelectedItem, Mode=TwoWay}"
+                  DisplayMemberPath="Key"
+                  Template="{StaticResource ComboBoxPagableTemplate}" />
+    </Grid>
 </UserControl>
diff --git a/FasdDesktopUi/Basics/UserControls/Ticket/CloseCaseDialogWithTicket.xaml.cs b/FasdDesktopUi/Basics/UserControls/Ticket/CloseCaseDialogWithTicket.xaml.cs
index 2860741..cb25345 100644
--- a/FasdDesktopUi/Basics/UserControls/Ticket/CloseCaseDialogWithTicket.xaml.cs
+++ b/FasdDesktopUi/Basics/UserControls/Ticket/CloseCaseDialogWithTicket.xaml.cs
@@ -1939,32 +1939,38 @@ namespace FasdDesktopUi.Basics.UserControls
                     }
                     break;
 
-                case "ErrorTypeValue":
-                    if (DynamicStatusAdditionBorder.Child is CloseTicketDialog closeTicketDialog2)
-                    {
-                        if (closeTicketDialog2.SelectedErrorType == null || closeTicketDialog2.SelectedErrorType is ComboBoxItem b && b.Tag == null)
-                        {
-                            if (!_errors.ContainsKey(propertyName))
-                                _errors.Add(propertyName, cMultiLanguageSupport.GetItem("Dialog.CloseCase.ValidationErrorTypeEmpty"));
-                        }
-                        else
-                        {
-                            if (_errors.ContainsKey(propertyName))
-                                _errors.Remove(propertyName);
-                        }
-                    }
-                    break;
+                case "ErrorTypeValue":
+                    if (DynamicStatusAdditionBorder.Child is CloseTicketDialog closeTicketDialog2)
+                    {
+                        if (closeTicketDialog2.SelectedErrorType == null || closeTicketDialog2.SelectedErrorType is ComboBoxItem b && b.Tag == null)
+                        {
+                            closeTicketDialog2.UpdateErrorTypeValidationState(true);
+                            if (!_errors.ContainsKey(propertyName))
+                                _errors.Add(propertyName, cMultiLanguageSupport.GetItem("Dialog.CloseCase.ValidationErrorTypeEmpty"));
+                        }
+                        else
+                        {
+                            closeTicketDialog2.UpdateErrorTypeValidationState(false);
+                            if (_errors.ContainsKey(propertyName))
+                                _errors.Remove(propertyName);
+                        }
+                    }
+                    break;
 
-                case "SelectedRoleAndPerson":
-                    if (DynamicStatusAdditionBorder.Child is ForwardTicketDialog forwardTicketDialog)
-                    {
-                        if ((forwardTicketDialog.SelectedPerson.Key == null || forwardTicketDialog.SelectedPerson.Value == null) &&
-                            (forwardTicketDialog.SelectedRole.Key == null || forwardTicketDialog.SelectedRole.Value == null))
-                        {
-                            if (!_errors.ContainsKey(propertyName))
-                                _errors.Add(propertyName, cMultiLanguageSupport.GetItem("Dialog.CloseCase.ValidationErrorRoleAndPersonEmpty"));
-                        }
-                        else
+                case "SelectedRoleAndPerson":
+                    if (DynamicStatusAdditionBorder.Child is ForwardTicketDialog forwardTicketDialog)
+                    {
+                        bool hasError = (forwardTicketDialog.SelectedPerson.Key == null || forwardTicketDialog.SelectedPerson.Value == null) &&
+                            (forwardTicketDialog.SelectedRole.Key == null || forwardTicketDialog.SelectedRole.Value == null);
+
+                        forwardTicketDialog.UpdateResponsibleSelectionValidationState(hasError);
+
+                        if (hasError)
+                        {
+                            if (!_errors.ContainsKey(propertyName))
+                                _errors.Add(propertyName, cMultiLanguageSupport.GetItem("Dialog.CloseCase.ValidationErrorRoleAndPersonEmpty"));
+                        }
+                        else
                         {
                             if (_errors.ContainsKey(propertyName))
                                 _errors.Remove(propertyName);
diff --git a/FasdDesktopUi/Basics/UserControls/Ticket/CloseTicketDialog.xaml b/FasdDesktopUi/Basics/UserControls/Ticket/CloseTicketDialog.xaml
index 1540a25..aa3f067 100644
--- a/FasdDesktopUi/Basics/UserControls/Ticket/CloseTicketDialog.xaml
+++ b/FasdDesktopUi/Basics/UserControls/Ticket/CloseTicketDialog.xaml
@@ -20,15 +20,22 @@
         <TextBlock Text="{Binding Converter={StaticResource LanguageConverter}, ConverterParameter=Dialog.CloseCase.CloseTicket.ErrorType}"
                    FontWeight="Bold"
                    Foreground="{DynamicResource FontColor.Menu.Categories}" />
-        <ComboBox x:Name="ErrorTypeComboBox" 
-                  Background="{DynamicResource BackgroundColor.DetailsPage.DataHistory.ValueColumn}"
-                  BorderBrush="{DynamicResource BackgroundColor.Menu.SubCategory.Hover}"
-                  SelectedItem="{Binding ElementName=CloseTicketDialogUc, Path=SelectedErrorType, Mode=TwoWay}"
-                  Margin="0 5 0 0"
-                  DropDownOpened="DropDownOpened"
-                  DropDownClosed="DropDownClosed"
-                  PreviewKeyDown="ErrorTypeComboBox_PreviewKeyDown"
-                  />
+        <Border x:Name="ErrorTypeValidationBorder"
+                Margin="0 5 0 0"
+                BorderThickness="1"
+                Padding="1"
+                CornerRadius="7.5"
+                Background="{DynamicResource BackgroundColor.DetailsPage.DataHistory.ValueColumn}"
+                BorderBrush="{DynamicResource BackgroundColor.Menu.SubCategory.Hover}">
+            <ComboBox x:Name="ErrorTypeComboBox"
+                      Background="{DynamicResource BackgroundColor.DetailsPage.DataHistory.ValueColumn}"
+                      BorderBrush="Transparent"
+                      BorderThickness="0"
+                      SelectionChanged="ErrorTypeComboBox_SelectionChanged"
+                      DropDownOpened="DropDownOpened"
+                      DropDownClosed="DropDownClosed"
+                      PreviewKeyDown="ErrorTypeComboBox_PreviewKeyDown" />
+        </Border>
         <TextBlock Text="{Binding Converter={StaticResource LanguageConverter}, ConverterParameter=Dialog.CloseCase.CloseTicket.Solution}"
                    FontWeight="Bold"
                    Foreground="{DynamicResource FontColor.Menu.Categories}" 
diff --git a/FasdDesktopUi/Basics/UserControls/Ticket/CloseTicketDialog.xaml.cs b/FasdDesktopUi/Basics/UserControls/Ticket/CloseTicketDialog.xaml.cs
index 7202c9c..26ae353 100644
--- a/FasdDesktopUi/Basics/UserControls/Ticket/CloseTicketDialog.xaml.cs
+++ b/FasdDesktopUi/Basics/UserControls/Ticket/CloseTicketDialog.xaml.cs
@@ -21,8 +21,17 @@ using static C4IT.Logging.cLogManager;
 
 namespace FasdDesktopUi.Basics.UserControls
 {
-    public partial class CloseTicketDialog : UserControl
-    {
+    public partial class CloseTicketDialog : UserControl
+    {
+        private static readonly Brush ValidationBrush = CreateValidationBrush();
+        private static Brush CreateValidationBrush()
+        {
+            var brush = new SolidColorBrush(Color.FromRgb(0xF5, 0x7C, 0x73));
+            if (brush.CanFreeze)
+                brush.Freeze();
+            return brush;
+        }
+        private Brush defaultErrorTypeBorderBrush;
         #region Properties
 
         public event EventHandler ErrorTypeValueChanged;
@@ -68,21 +77,33 @@ namespace FasdDesktopUi.Basics.UserControls
         }
 
         // Using a DependencyProperty as the backing store for SelectedErrorType.  This enables animation, styling, binding, etc...
-        public static readonly DependencyProperty SelectedErrorTypeProperty =
-            DependencyProperty.Register("SelectedErrorType", typeof(ComboBoxItem), typeof(CloseTicketDialog), new PropertyMetadata(null, OnSelectedErrorTypeChanged));
-        private static void OnSelectedErrorTypeChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
-        {
-            var control = (CloseTicketDialog)d;
-            control.ErrorTypeValueChanged?.Invoke(control, EventArgs.Empty);
-        }
+        public static readonly DependencyProperty SelectedErrorTypeProperty =
+            DependencyProperty.Register("SelectedErrorType", typeof(ComboBoxItem), typeof(CloseTicketDialog), new PropertyMetadata(null, OnSelectedErrorTypeChanged));
+        private static void OnSelectedErrorTypeChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
+        {
+            if (!(d is CloseTicketDialog control))
+                return;
+
+            var newItem = e.NewValue as ComboBoxItem;
+            bool hasError = newItem == null || newItem.Tag == null;
+
+            if (control.ErrorTypeComboBox != null && !Equals(control.ErrorTypeComboBox.SelectedItem, newItem))
+            {
+                control.ErrorTypeComboBox.SelectedItem = newItem;
+            }
+
+            control.UpdateErrorTypeValidationState(hasError);
+            control.ErrorTypeValueChanged?.Invoke(control, EventArgs.Empty);
+        }
 
 
         #endregion
 
-        public CloseTicketDialog()
-        {
-            InitializeComponent();
-        }
+        public CloseTicketDialog()
+        {
+            InitializeComponent();
+            defaultErrorTypeBorderBrush = ErrorTypeValidationBorder?.BorderBrush?.CloneCurrentValue();
+        }
 
         protected override void OnInitialized(EventArgs e)
         {
@@ -170,11 +191,36 @@ namespace FasdDesktopUi.Basics.UserControls
 
         }
 
-        private void ErrorTypeComboBox_PreviewKeyDown(object sender, KeyEventArgs e)
-        {
-            if(e.Key == Key.Escape) { 
-                DropDownClosed(sender, e);
-            }
-        }
-    }
-}
+        private void ErrorTypeComboBox_PreviewKeyDown(object sender, KeyEventArgs e)
+        {
+            if(e.Key == Key.Escape) { 
+                DropDownClosed(sender, e);
+            }
+        }
+
+        private void ErrorTypeComboBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
+        {
+            var selected = ErrorTypeComboBox?.SelectedItem as ComboBoxItem;
+
+            if (!Equals(SelectedErrorType, selected))
+            {
+                SelectedErrorType = selected;
+                return;
+            }
+
+            bool hasError = selected == null || selected.Tag == null;
+            UpdateErrorTypeValidationState(hasError);
+        }
+
+        public void UpdateErrorTypeValidationState(bool hasError)
+        {
+            if (ErrorTypeValidationBorder == null)
+                return;
+
+            if (defaultErrorTypeBorderBrush == null)
+                defaultErrorTypeBorderBrush = ErrorTypeValidationBorder.BorderBrush?.CloneCurrentValue();
+
+            ErrorTypeValidationBorder.BorderBrush = hasError ? ValidationBrush : defaultErrorTypeBorderBrush;
+        }
+    }
+}
diff --git a/FasdDesktopUi/Basics/UserControls/Ticket/ForwardTicketDialog.xaml b/FasdDesktopUi/Basics/UserControls/Ticket/ForwardTicketDialog.xaml
index 68c83f3..702fbe2 100644
--- a/FasdDesktopUi/Basics/UserControls/Ticket/ForwardTicketDialog.xaml
+++ b/FasdDesktopUi/Basics/UserControls/Ticket/ForwardTicketDialog.xaml
@@ -19,21 +19,35 @@
                    FontWeight="Bold"
                    Foreground="{DynamicResource FontColor.Menu.Categories}" />
 
-        <local:ComboBoxPageable x:Name="RoleSelectionControl"
-                                SelectedItem="{Binding ElementName=ForwardTicketDialogUc, Path=SelectedRole, Mode=TwoWay}"
-                                Margin="0 5 0 10"
-                                ComboBoxBackground="{DynamicResource BackgroundColor.DetailsPage.DataHistory.ValueColumn}"
-                                BorderBrush="{DynamicResource BackgroundColor.Menu.SubCategory.Hover}" />
-
-        <TextBlock Text="{Binding Converter={StaticResource LanguageConverter}, ConverterParameter=Dialog.CloseCase.ForwardTicket.ResponsiblePerson}"
-                   FontWeight="Bold"
-                   Foreground="{DynamicResource FontColor.Menu.Categories}" />
-
-        <local:ComboBoxPageable x:Name="PersonSelectionControl"
-                                Margin="0 5 0 10"
-                                SelectedItem="{Binding ElementName=ForwardTicketDialogUc, Path=SelectedPerson, Mode=TwoWay}"
-                                ComboBoxBackground="{DynamicResource BackgroundColor.DetailsPage.DataHistory.ValueColumn}"
-                                BorderBrush="{DynamicResource BackgroundColor.Menu.SubCategory.Hover}" />
+        <Border x:Name="RoleValidationBorder"
+                Margin="0 5 0 10"
+                BorderThickness="1"
+                Padding="1"
+                CornerRadius="7.5"
+                Background="{DynamicResource BackgroundColor.DetailsPage.DataHistory.ValueColumn}"
+                BorderBrush="{DynamicResource BackgroundColor.Menu.SubCategory.Hover}">
+            <local:ComboBoxPageable x:Name="RoleSelectionControl"
+                                    SelectedItem="{Binding ElementName=ForwardTicketDialogUc, Path=SelectedRole, Mode=TwoWay}"
+                                    ComboBoxBackground="{DynamicResource BackgroundColor.DetailsPage.DataHistory.ValueColumn}"
+                                    BorderBrush="Transparent" />
+        </Border>
+
+        <TextBlock Text="{Binding Converter={StaticResource LanguageConverter}, ConverterParameter=Dialog.CloseCase.ForwardTicket.ResponsiblePerson}"
+                   FontWeight="Bold"
+                   Foreground="{DynamicResource FontColor.Menu.Categories}" />
+
+        <Border x:Name="PersonValidationBorder"
+                Margin="0 5 0 10"
+                BorderThickness="1"
+                Padding="1"
+                CornerRadius="7.5"
+                Background="{DynamicResource BackgroundColor.DetailsPage.DataHistory.ValueColumn}"
+                BorderBrush="{DynamicResource BackgroundColor.Menu.SubCategory.Hover}">
+            <local:ComboBoxPageable x:Name="PersonSelectionControl"
+                                    SelectedItem="{Binding ElementName=ForwardTicketDialogUc, Path=SelectedPerson, Mode=TwoWay}"
+                                    ComboBoxBackground="{DynamicResource BackgroundColor.DetailsPage.DataHistory.ValueColumn}"
+                                    BorderBrush="Transparent" />
+        </Border>
 
         <TextBlock Text="{Binding Converter={StaticResource LanguageConverter}, ConverterParameter=Dialog.CloseCase.ForwardTicket.Comment}"
                    FontWeight="Bold"
diff --git a/FasdDesktopUi/Basics/UserControls/Ticket/ForwardTicketDialog.xaml.cs b/FasdDesktopUi/Basics/UserControls/Ticket/ForwardTicketDialog.xaml.cs
index 2056426..622a7ae 100644
--- a/FasdDesktopUi/Basics/UserControls/Ticket/ForwardTicketDialog.xaml.cs
+++ b/FasdDesktopUi/Basics/UserControls/Ticket/ForwardTicketDialog.xaml.cs
@@ -5,15 +5,27 @@ using System.Collections.Generic;
 using System.Collections.ObjectModel;
 using System.Linq;
 using System.Threading.Tasks;
-using System.Windows;
-using System.Windows.Controls;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Media;
 using static C4IT.Logging.cLogManager;
 
 namespace FasdDesktopUi.Basics.UserControls
 {
     public partial class ForwardTicketDialog : UserControl
     {
-        private readonly cSupportCaseDataProvider _dataProvider;
+        private readonly cSupportCaseDataProvider _dataProvider;
+        private static readonly Brush ValidationBrush = CreateValidationBrush();
+        private static Brush CreateValidationBrush()
+        {
+            var brush = new SolidColorBrush(Color.FromRgb(0xF5, 0x7C, 0x73));
+            if (brush.CanFreeze)
+                brush.Freeze();
+            return brush;
+        }
+
+        private Brush defaultRoleBorderBrush;
+        private Brush defaultPersonBorderBrush;
 
         string lastPersonSearch = string.Empty;
         string lastRoleSearch = string.Empty;
@@ -71,11 +83,14 @@ namespace FasdDesktopUi.Basics.UserControls
         }
 
 
-        public ForwardTicketDialog(cSupportCaseDataProvider dataProvider)
-        {
-            InitializeComponent();
-            _dataProvider = dataProvider;
-        }
+        public ForwardTicketDialog(cSupportCaseDataProvider dataProvider)
+        {
+            InitializeComponent();
+            _dataProvider = dataProvider;
+            defaultRoleBorderBrush = RoleValidationBorder?.BorderBrush?.CloneCurrentValue();
+            defaultPersonBorderBrush = PersonValidationBorder?.BorderBrush?.CloneCurrentValue();
+            UpdateResponsibleSelectionValidationState(true);
+        }
 
         protected override void OnInitialized(EventArgs e)
         {
@@ -169,8 +184,8 @@ namespace FasdDesktopUi.Basics.UserControls
             }
         }
 
-        private ObservableCollection<KeyValuePair<string, object>> GetRoleSelectionData(cF4SDHealthCardRawData.cHealthCardTable dataTable)
-        {
+        private ObservableCollection<KeyValuePair<string, object>> GetRoleSelectionData(cF4SDHealthCardRawData.cHealthCardTable dataTable)
+        {
             try
             {
                 if (dataTable is null || dataTable.Name != "M42Wpm-Ticket-Roles")
@@ -191,6 +206,30 @@ namespace FasdDesktopUi.Basics.UserControls
             }
 
             return null;
-        }
-    }
-}
+        }
+
+        public void UpdateResponsibleSelectionValidationState(bool hasError)
+        {
+            try
+            {
+                if (RoleValidationBorder != null)
+                {
+                    if (defaultRoleBorderBrush == null)
+                        defaultRoleBorderBrush = RoleValidationBorder.BorderBrush?.CloneCurrentValue();
+                    RoleValidationBorder.BorderBrush = hasError ? ValidationBrush : defaultRoleBorderBrush;
+                }
+
+                if (PersonValidationBorder != null)
+                {
+                    if (defaultPersonBorderBrush == null)
+                        defaultPersonBorderBrush = PersonValidationBorder.BorderBrush?.CloneCurrentValue();
+                    PersonValidationBorder.BorderBrush = hasError ? ValidationBrush : defaultPersonBorderBrush;
+                }
+            }
+            catch (Exception E)
+            {
+                LogException(E);
+            }
+        }
+    }
+}