diff --git a/src/BreCalClient/MainWindow.xaml b/src/BreCalClient/MainWindow.xaml
index 3d89272..647c6b6 100644
--- a/src/BreCalClient/MainWindow.xaml
+++ b/src/BreCalClient/MainWindow.xaml
@@ -26,6 +26,7 @@
                     <RowDefinition Height="28" />
                     <RowDefinition Height="28" />
                     <RowDefinition Height="28" />
+                    <RowDefinition Height="84" />
                 </Grid.RowDefinitions>
                 <Grid.ColumnDefinitions>
                     <ColumnDefinition Width="1*" />
@@ -39,6 +40,11 @@
                 <Label Name="labelLoginResult" Grid.Row="3" Grid.ColumnSpan="2" HorizontalContentAlignment="Center" VerticalContentAlignment="Center" FontWeight="Bold" />
                 <Button Name="buttonLogin" Content="{x:Static p:Resources.textLogin}" Grid.Row="4" Grid.Column="0" Margin="2" Click="buttonLogin_Click" IsDefault="True" />
                 <Button Name="buttonExit" Content="{x:Static p:Resources.textExit}" Grid.Row="4" Grid.Column="1" Margin="2" Click="buttonExit_Click" />
+                <TextBlock FontSize="10" TextWrapping="Wrap" Grid.Row="5" Grid.Column="0" Grid.ColumnSpan="2" >
+                    <Underline>Hinweis</Underline>:<LineBreak /> 
+                    Bei dem derzeitigen System handelt es sich um einen <Bold>Testbetrieb</Bold>.<LineBreak />
+                    Alle angegebenen Daten sind <Bold>unverbindlich</Bold> und lösen damit keinerlei Auftrag oder Bestellung aus.<LineBreak/>Bei Fragen oder Anmerkungen wenden Sie sich gern an <Hyperlink NavigateUri="mailto:bremencalling@bsmd.de" RequestNavigate="Hyperlink_RequestNavigate">bremencalling@bsmd.de</Hyperlink>.
+                </TextBlock> 
             </Grid>
         </xctk:BusyIndicator.BusyContent>
         <Grid>
diff --git a/src/BreCalClient/MainWindow.xaml.cs b/src/BreCalClient/MainWindow.xaml.cs
index e5bfe61..de9d268 100644
--- a/src/BreCalClient/MainWindow.xaml.cs
+++ b/src/BreCalClient/MainWindow.xaml.cs
@@ -815,8 +815,14 @@ namespace BreCalClient
             if (App.Participant.IsTypeFlagSet(Extensions.ParticipantType.BSMD))
                 this.buttonNew.Visibility = Visibility.Visible;
         }
+      
+        private void Hyperlink_RequestNavigate(object sender, System.Windows.Navigation.RequestNavigateEventArgs e)
+        {
+            Process.Start(new ProcessStartInfo(e.Uri.AbsoluteUri) { UseShellExecute = true });
+            e.Handled = true;
+        }
 
         #endregion
-        
+
     }
 }