diff --git a/BeWoPlanerMobil/BeWoPlanerMobil.csproj b/BeWoPlanerMobil/BeWoPlanerMobil.csproj
index 540d2cc59..5212d421f 100644
--- a/BeWoPlanerMobil/BeWoPlanerMobil.csproj
+++ b/BeWoPlanerMobil/BeWoPlanerMobil.csproj
@@ -27,7 +27,7 @@
     <Use64BitIISExpress>false</Use64BitIISExpress>
     <NuGetPackageImportStamp>
     </NuGetPackageImportStamp>
-    <TypeScriptToolsVersion>3.7</TypeScriptToolsVersion>
+    <TypeScriptToolsVersion>4.3</TypeScriptToolsVersion>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <DebugSymbols>true</DebugSymbols>
diff --git a/BeWoPlanerMobil/BeWoPlanerMobil.csproj.user b/BeWoPlanerMobil/BeWoPlanerMobil.csproj.user
index 059ea230a..2e25948f0 100644
--- a/BeWoPlanerMobil/BeWoPlanerMobil.csproj.user
+++ b/BeWoPlanerMobil/BeWoPlanerMobil.csproj.user
@@ -22,6 +22,7 @@
     <WebStackScaffolding_IsAsyncSelected>False</WebStackScaffolding_IsAsyncSelected>
     <View_SelectedScaffolderID>MvcViewScaffolder</View_SelectedScaffolderID>
     <View_SelectedScaffolderCategoryPath>root/Common/MVC/View</View_SelectedScaffolderCategoryPath>
+    <ToolsVersionPromptShown>3.7</ToolsVersionPromptShown>
   </PropertyGroup>
   <ProjectExtensions>
     <VisualStudio>
diff --git a/BeWoPlanerMobil/Controllers/CustomerController.cs b/BeWoPlanerMobil/Controllers/CustomerController.cs
index 46c0be946..e1297ecb5 100644
--- a/BeWoPlanerMobil/Controllers/CustomerController.cs
+++ b/BeWoPlanerMobil/Controllers/CustomerController.cs
@@ -10,6 +10,7 @@ using BS.Shared;
 using BS.Shared.Core;
 using BS.Shared.DataContracts;
 using BS.Shared.DataContracts.Compact;
+using BS.Shared.Extensions;
 using DevExpress.XtraReports.UI;
 
 namespace BeWoPlanerMobil.Controllers
@@ -197,7 +198,7 @@ namespace BeWoPlanerMobil.Controllers
 
             if(isAllowedToEdit && Model.SelectedCustomer != null)
             {
-                Model.SelectedCustomer.Notice = newNotice;
+                Model.SelectedCustomer.Notice = newNotice?.RemoveUppercaseEsszett();
 
                 var customerOid = CustomerService.UpdateCustomer(Model.SelectedCustomer);
                 Model.SelectedCustomer = CustomerService.LoadCustomer(customerOid);
@@ -257,29 +258,27 @@ namespace BeWoPlanerMobil.Controllers
                 return Logout();
             }
 
-            // ToDo: Stammdaten aus formCollection holen, validieren und Customer-Objekt aktualisieren.
+            var firstname = formCollection["vorname"]?.RemoveUppercaseEsszett();
+            var lastname = formCollection["nachname"]?.RemoveUppercaseEsszett();
+            var geburtdatum = formCollection["geburtstag"]?.RemoveUppercaseEsszett();
+            var geschlecht = formCollection["geschlecht"]?.RemoveUppercaseEsszett();
 
-            var firstname = formCollection["vorname"];
-            var lastname = formCollection["nachname"];
-            var geburtdatum = formCollection["geburtstag"];
-            var geschlecht = formCollection["geschlecht"];
+            var adresszusatz = formCollection["adresszusatz"]?.RemoveUppercaseEsszett();
+            var street = formCollection["strasse"]?.RemoveUppercaseEsszett();
+            var postalCode = formCollection["plz"]?.RemoveUppercaseEsszett();
+            var city = formCollection["ort"]?.RemoveUppercaseEsszett();
 
-            var adresszusatz = formCollection["adresszusatz"];
-            var street = formCollection["strasse"];
-            var postalCode = formCollection["plz"];
-            var city = formCollection["ort"];
+            var nameInvoiceAddress = formCollection["name-rechnungsadresse"]?.RemoveUppercaseEsszett();
+            var streetInvoiceAddress = formCollection["strasse-rechnungsadresse"]?.RemoveUppercaseEsszett();
+            var postalCodeInvoiceAddress = formCollection["plz-rechnungsadresse"]?.RemoveUppercaseEsszett();
+            var cityInvoiceAddress = formCollection["ort-rechnungsadresse"]?.RemoveUppercaseEsszett();
 
-            var nameInvoiceAddress = formCollection["name-rechnungsadresse"];
-            var streetInvoiceAddress = formCollection["strasse-rechnungsadresse"];
-            var postalCodeInvoiceAddress = formCollection["plz-rechnungsadresse"];
-            var cityInvoiceAddress = formCollection["ort-rechnungsadresse"];
+            var mobile = formCollection["handy"]?.RemoveUppercaseEsszett();
+            var phone = formCollection["telefon"]?.RemoveUppercaseEsszett();
+            var fax = formCollection["fax"]?.RemoveUppercaseEsszett();
+            var eMailAddress = formCollection["mail"]?.RemoveUppercaseEsszett();
 
-            var mobile = formCollection["handy"];
-            var phone = formCollection["telefon"];
-            var fax = formCollection["fax"];
-            var eMailAddress = formCollection["mail"];
-
-            var notice = formCollection["notiz"];
+            var notice = formCollection["notiz"]?.RemoveUppercaseEsszett();
 
             var customer = Model.SelectedCustomer;
 
diff --git a/BeWoPlanerMobil/Controllers/MainController.cs b/BeWoPlanerMobil/Controllers/MainController.cs
index c776a2057..752a6db5c 100644
--- a/BeWoPlanerMobil/Controllers/MainController.cs
+++ b/BeWoPlanerMobil/Controllers/MainController.cs
@@ -935,10 +935,10 @@ namespace BeWoPlanerMobil.Controllers
                     int.TryParse(collection[FormCollectionConstants.DurationKey], out dauer);
                 }
 
-                var doku2 = collection[FormCollectionConstants.Dokumentation2Key];
-                var doku3 = collection[FormCollectionConstants.Dokumentation3Key];
-                var doku4 = collection[FormCollectionConstants.Dokumentation4Key];
-                var doku5 = collection[FormCollectionConstants.Dokumentation5Key];
+                var doku2 = collection[FormCollectionConstants.Dokumentation2Key]?.RemoveUppercaseEsszett();
+                var doku3 = collection[FormCollectionConstants.Dokumentation3Key]?.RemoveUppercaseEsszett();
+                var doku4 = collection[FormCollectionConstants.Dokumentation4Key]?.RemoveUppercaseEsszett();
+                var doku5 = collection[FormCollectionConstants.Dokumentation5Key]?.RemoveUppercaseEsszett();
 
                 var zeitenFeld = new DateTime[2];
 
@@ -1039,12 +1039,12 @@ namespace BeWoPlanerMobil.Controllers
                     Model.NewServiceRecord.ServiceRecordFormat = ServiceRecordFormate.ZeiterfassungMitEndDatum;
                 }
 
-                Model.NewServiceRecord.Notice = string.IsNullOrEmpty(doku1) ? null : doku1;
+                Model.NewServiceRecord.Notice = string.IsNullOrEmpty(doku1) ? null : doku1?.RemoveUppercaseEsszett();
 
-                Model.NewServiceRecord.Notice2 = string.IsNullOrEmpty(doku2) ? null : doku2;
-                Model.NewServiceRecord.Notice3 = string.IsNullOrEmpty(doku3) ? null : doku3;
-                Model.NewServiceRecord.Notice4 = string.IsNullOrEmpty(doku4) ? null : doku4;
-                Model.NewServiceRecord.Notice5 = string.IsNullOrEmpty(doku5) ? null : doku5;
+                Model.NewServiceRecord.Notice2 = string.IsNullOrEmpty(doku2) ? null : doku2?.RemoveUppercaseEsszett();
+                Model.NewServiceRecord.Notice3 = string.IsNullOrEmpty(doku3) ? null : doku3?.RemoveUppercaseEsszett();
+                Model.NewServiceRecord.Notice4 = string.IsNullOrEmpty(doku4) ? null : doku4?.RemoveUppercaseEsszett();
+                Model.NewServiceRecord.Notice5 = string.IsNullOrEmpty(doku5) ? null : doku5?.RemoveUppercaseEsszett();
 
                 var serviceDescOid = 0L;
 
@@ -1206,11 +1206,11 @@ namespace BeWoPlanerMobil.Controllers
                         CustomerCount     = personCount,
                         StartDate         = Model.NewServiceRecord.Start,
                         EndDate           = Model.NewServiceRecord.End,
-                        Notice            = Model.NewServiceRecord.Notice,
-                        Notice2           = Model.NewServiceRecord.Notice2,
-                        Notice3           = Model.NewServiceRecord.Notice3,
-                        Notice4           = Model.NewServiceRecord.Notice4,
-                        Notice5           = Model.NewServiceRecord.Notice5,
+                        Notice            = Model.NewServiceRecord.Notice?.RemoveUppercaseEsszett(),
+                        Notice2           = Model.NewServiceRecord.Notice2?.RemoveUppercaseEsszett(),
+                        Notice3           = Model.NewServiceRecord.Notice3?.RemoveUppercaseEsszett(),
+                        Notice4           = Model.NewServiceRecord.Notice4?.RemoveUppercaseEsszett(),
+                        Notice5           = Model.NewServiceRecord.Notice5?.RemoveUppercaseEsszett(),
                         ServiceRecordList = newDCList
                     };
 
@@ -1309,22 +1309,22 @@ namespace BeWoPlanerMobil.Controllers
             Model.NewServiceRecord.RoundedDuration = roundedDuration;
             Model.NewServiceRecord.GroupRoundedDuration = groupDuration;
 
-            group.Notice = Model.NewServiceRecord.Notice;
-            group.Notice2 = Model.NewServiceRecord.Notice2;
-            group.Notice3 = Model.NewServiceRecord.Notice3;
-            group.Notice4 = Model.NewServiceRecord.Notice4;
-            group.Notice5 = Model.NewServiceRecord.Notice5;
+            group.Notice = Model.NewServiceRecord.Notice?.RemoveUppercaseEsszett();
+            group.Notice2 = Model.NewServiceRecord.Notice2?.RemoveUppercaseEsszett();
+            group.Notice3 = Model.NewServiceRecord.Notice3?.RemoveUppercaseEsszett();
+            group.Notice4 = Model.NewServiceRecord.Notice4?.RemoveUppercaseEsszett();
+            group.Notice5 = Model.NewServiceRecord.Notice5?.RemoveUppercaseEsszett();
             group.RoundedDuration = groupDuration;
             group.StartDate = Model.NewServiceRecord.Start;
             group.EndDate = Model.NewServiceRecord.End;
 
             foreach(var item in group.ServiceRecordList)
             {
-                item.Notice = Model.NewServiceRecord.Notice;
-                item.Notice2 = Model.NewServiceRecord.Notice2;
-                item.Notice3 = Model.NewServiceRecord.Notice3;
-                item.Notice4 = Model.NewServiceRecord.Notice4;
-                item.Notice5 = Model.NewServiceRecord.Notice5;
+                item.Notice = Model.NewServiceRecord.Notice?.RemoveUppercaseEsszett();
+                item.Notice2 = Model.NewServiceRecord.Notice2?.RemoveUppercaseEsszett();
+                item.Notice3 = Model.NewServiceRecord.Notice3?.RemoveUppercaseEsszett();
+                item.Notice4 = Model.NewServiceRecord.Notice4?.RemoveUppercaseEsszett();
+                item.Notice5 = Model.NewServiceRecord.Notice5?.RemoveUppercaseEsszett();
                 item.End = Model.NewServiceRecord.End;
                 item.Start = Model.NewServiceRecord.Start;
                 item.RoundedDuration = roundedDuration;
@@ -2539,11 +2539,11 @@ namespace BeWoPlanerMobil.Controllers
                 return;
             }
 
+            ResetModel();
+
             Model.IsInGroupBookingMode = bookingMode == BookingMode.GroupBookingMode;
             Model.IsInMultiBookingMode = bookingMode == BookingMode.MultiBookingMode;
 
-            ResetModel();
-
             if(bookingMode == BookingMode.GroupBookingMode)
             {
                 ResetMultiBookingMode();
@@ -3302,7 +3302,7 @@ namespace BeWoPlanerMobil.Controllers
             {
                 Employee = employee,
                 Customer = customer,
-                Notice = notice,
+                Notice = notice?.RemoveUppercaseEsszett(),
                 InsertedOn = DateTime.Now,
                 InsUser = employee?.ToString(),
                 IsCreatedInMobileClient = true
@@ -3351,6 +3351,9 @@ namespace BeWoPlanerMobil.Controllers
                 return Logout();
             }
 
+            TempData[TempDataConstants.IsInTransferModeKey] = null;
+            TempData[TempDataConstants.AppointmentListItemKey] = null;
+
             try
             {
                 var isInMultiBookingMode = "true,false" == formCollection[FormCollectionConstants.IsInMultiBookingModeKey];
diff --git a/BeWoPlanerMobil/Controllers/SchedulerController.cs b/BeWoPlanerMobil/Controllers/SchedulerController.cs
index 806464eb6..bbcaa89e2 100644
--- a/BeWoPlanerMobil/Controllers/SchedulerController.cs
+++ b/BeWoPlanerMobil/Controllers/SchedulerController.cs
@@ -219,20 +219,20 @@ namespace BeWoPlanerMobil.Controllers
                         {
                             AllDay                   = appointment.AllDay,
                             CustomerList             = appointment.CustomerList,
-                            Description              = appointment.Description,
+                            Description              = appointment.Description?.RemoveUppercaseEsszett(),
                             EmployeeList             = appointment.EmployeeList,
                             EndDate                  = app.Start.AddMinutes(duration),
                             FormerBookingSequenceOid = appointment.FormerBookingSequenceOid,
                             IsPrivate                = appointment.IsPrivate,
                             LabelKey                 = appointment.LabelKey,
-                            Location                 = appointment.Location,
+                            Location                 = appointment.Location?.RemoveUppercaseEsszett(),
                             Originator               = appointment.Originator,
                             RecurrenceInfo           = app.RecurrenceInfo.ToXml(),
                             RecurrenceIndex          = index,
                             ReminderInfo             = appointment.ReminderInfo,
                             ResourceList             = appointment.ResourceList,
                             StartDate                = app.Start,
-                            Subject                  = appointment.Subject ?? "",
+                            Subject                  = appointment.Subject?.RemoveUppercaseEsszett() ?? "",
                             Type                     = (int) app.Type,
                             ServiceRecordList        = appointment.ServiceRecordList,
                             SupportConceptList       = appointment.SupportConceptList
@@ -271,6 +271,10 @@ namespace BeWoPlanerMobil.Controllers
                 var location     = formCollection[FormCollectionConstants.AppointmentLocationKey];
                 var notice       = formCollection[FormCollectionConstants.AppointmentNoticeKey];
 
+                subject = subject.RemoveUppercaseEsszett();
+                location = location.RemoveUppercaseEsszett();
+                notice = notice.RemoveUppercaseEsszett();
+
                 var isPrivate = formCollection[FormCollectionConstants.AppointmentIsPrivateKey] == "true,false";
                 var allDay = formCollection[FormCollectionConstants.AppointmentIsAllDayKey] == "true,false";
 
@@ -325,6 +329,7 @@ namespace BeWoPlanerMobil.Controllers
                     appointmentToInsert.CustomerList       = Model.SelectedCustomers;
                     appointmentToInsert.ResourceList       = Model.SelectedResources ?? new List<ResourceDC>();
                     appointmentToInsert.SupportConceptList = isNew ? new List<CompactSupportConceptDC>() : appointmentToInsert.SupportConceptList;
+                    appointmentToInsert.ServiceRecordList  = isNew ? new List<ServiceRecordDC>() : appointmentToInsert.ServiceRecordList;
                     appointmentToInsert.EndDate            = endDate;
                     appointmentToInsert.StartDate          = startDate;
                     appointmentToInsert.Subject            = subject;
@@ -1045,7 +1050,7 @@ namespace BeWoPlanerMobil.Controllers
                 CompletedNotice          = schedulerAppointment.CompletedNotice,
                 CompletedUser            = schedulerAppointment.CompletedUser,
                 CustomerList             = schedulerAppointment.CustomerList ?? new List<CompactCustomerDC>(),
-                Description              = schedulerAppointment.Description,
+                Description              = schedulerAppointment.Description?.RemoveUppercaseEsszett(),
                 DueDate                  = schedulerAppointment.DueDate,
                 FormerBookingSequenceOid = schedulerAppointment.FormerBookingSequenceOid,
                 FormerTaskOid            = schedulerAppointment.FormerTaskOid,
@@ -1054,13 +1059,13 @@ namespace BeWoPlanerMobil.Controllers
                 IsTask                   = schedulerAppointment.IsTask,
                 IsTeilnahmeBestaetigung  = schedulerAppointment.IsTeilnahmeBestaetigung,
                 LabelKey                 = schedulerAppointment.LabelKey,
-                Location                 = schedulerAppointment.Location,
+                Location                 = schedulerAppointment.Location?.RemoveUppercaseEsszett(),
                 Originator               = schedulerAppointment.Originator,
                 RecurrenceInfo           = recurrenceInfo,
                 ReminderInfo             = schedulerAppointment.ReminderInfo,
                 ResourceList             = schedulerAppointment.ResourceList ?? new List<ResourceDC>(),
                 Status                   = schedulerAppointment.Status,
-                Subject                  = schedulerAppointment.Subject,
+                Subject                  = schedulerAppointment.Subject?.RemoveUppercaseEsszett() ?? string.Empty,
                 SupportConceptList       = schedulerAppointment.SupportConceptList ?? new List<CompactSupportConceptDC>(),
                 TaskDescription          = schedulerAppointment.TaskDescription,
                 Type                     = type
diff --git a/BeWoPlanerMobil/Util/AppointmentListItem.cs b/BeWoPlanerMobil/Util/AppointmentListItem.cs
index efd22dedc..697eda3f5 100644
--- a/BeWoPlanerMobil/Util/AppointmentListItem.cs
+++ b/BeWoPlanerMobil/Util/AppointmentListItem.cs
@@ -65,7 +65,7 @@ namespace BeWoPlanerMobil.Util
         public bool HasEmployeesCustomersOrResources => !string.IsNullOrWhiteSpace(EmployeeListInfo + CustomerListInfo + ResourceListInfo);
         public bool AllDay { get; }
 
-        public bool HasServiceRecord => SchedulerAppointment?.ServiceRecordList?.Any() ?? false;
+        public bool HasServiceRecord => (SchedulerAppointment?.ServiceRecordList?.Any() ?? false) || (SchedulerAppointment?.HasServiceRecordEntry ?? false);
 
         public string Subject { get; }
 
diff --git a/BeWoPlanerMobil/Views/Shared/_Layout.cshtml b/BeWoPlanerMobil/Views/Shared/_Layout.cshtml
index 91ca236e7..48a01c1d2 100644
--- a/BeWoPlanerMobil/Views/Shared/_Layout.cshtml
+++ b/BeWoPlanerMobil/Views/Shared/_Layout.cshtml
@@ -11,8 +11,13 @@
 
     <script defer src="~/Content/fontawesome/all.min.js"></script>
 
-    <!-- jquery first, then Popper.js, then Bootstrap JS --><!-- jquery first, then Popper.js, then Bootstrap JS -->
-    @*<script src="@Url.Content("~/Scripts/jquery-3.6.0.min.js")" type="text/javascript"></script>*@
+    <!--
+        Einbindereihenfolge der Skripte für Bootstrap:
+        1. jQuery
+        2. Popper
+        3. Bootstrap
+    -->
+
     <script src="@Url.Content("~/node_modules/jquery/dist/jquery.min.js")"></script>
     <script src="@Url.Content("~/node_modules/jquery-ui/dist/jquery-ui.min.js")"></script>
     <script src="@Url.Content("~/node_modules/jquery-validation/dist/jquery.validate.min.js")"></script>
@@ -23,24 +28,19 @@
     <script src="@Url.Content("~/node_modules/cldrjs/dist/cldr/supplemental.js")"></script>
     <script src="@Url.Content("~/node_modules/cldrjs/dist/cldr/unresolved.js")"></script>
 
-    <script src="@Url.Content("~/node_modules/cldrjs/dist/cldr.js")"></script>
-    <script src="@Url.Content("~/node_modules/cldrjs/dist/cldr/event.js")"></script>
-    <script src="@Url.Content("~/node_modules/cldrjs/dist/cldr/supplemental.js")"></script>
-    <script src="@Url.Content("~/node_modules/cldrjs/dist/cldr/unresolved.js")"></script>
-
     <script src="@Url.Content("~/node_modules/globalize/dist/globalize.js")"></script>
     <script src="@Url.Content("~/node_modules/globalize/dist/globalize/message.js")"></script>
     <script src="@Url.Content("~/node_modules/globalize/dist/globalize/number.js")"></script>
     <script src="@Url.Content("~/node_modules/globalize/dist/globalize/currency.js")"></script>
     <script src="@Url.Content("~/node_modules/globalize/dist/globalize/date.js")"></script>
-    
+
     <script src="@Url.Content("~/node_modules/ace-builds/src-min/ace.js")"></script>
     <script src="@Url.Content("~/node_modules/ace-builds/src-min/ext-language_tools.js")"></script>
     <script src="@Url.Content("~/node_modules/ace-builds/src-min/theme-dreamweaver.js")"></script>
     <script src="@Url.Content("~/node_modules/ace-builds/src-min/theme-ambiance.js")"></script>
-    
+
     <link href="@Url.Content("~/node_modules/jquery-ui/dist/themes/base/jquery-ui.min.css")" rel="stylesheet" type="text/css" />
-    
+
     <script src="@Url.Content("~/Scripts/dx.all.js")"></script>
 
     <script src="@Url.Content("~/node_modules/popper.js/dist/umd/popper.js")"></script>
@@ -67,7 +67,7 @@
     <script src="~/Scripts/utils/service-record-time-calc.js?v=1.18"></script>
     <script src="~/Scripts/utils/js-helper.js?v=1.18"></script>
     <script src="~/Scripts/utils/logging.js?v=1.18"></script>
-    
+
     @Html.DevExpress().GetStyleSheets(
         new StyleSheet { ExtensionSuite = ExtensionSuite.Report }
         )
@@ -251,8 +251,6 @@
             }
         }
     </script>
-    @Styles.Render("~/Content/DevExtremeBundle")
-    @Scripts.Render("~/Scripts/DevExtremeBundle")
 </head>
 <body>
     
@@ -280,17 +278,17 @@
             <div class="collapse navbar-collapse" id="navbarResponsive">
                 <ul class="navbar-nav ml-auto">
                     @*@if(Html.IsInDebugMode())
-        {
-            using(Html.BeginForm("RedirectToDevExpressScheduler", "Main", FormMethod.Post))
-            {
-                <li class="nav-item">
-                    <button class="btn btn-link text-light no-underline" onclick="showSpinner()">
-                        <i class="fas fa-hand-middle-finger"></i>
-                        Scheduler
-                    </button>
-                </li>
-            }
-        }*@
+                    {
+                        using(Html.BeginForm("RedirectToDevExpressScheduler", "Main", FormMethod.Post))
+                        {
+                            <li class="nav-item">
+                                <button class="btn btn-link text-light no-underline" onclick="showSpinner()">
+                                    <i class="fas fa-hand-middle-finger"></i>
+                                    Scheduler
+                                </button>
+                            </li>
+                        }
+                    }*@
 
                     @if(AbstractModel.IsAllowedToSeeCustomers)
                     {
@@ -346,7 +344,7 @@
                     <li class="nav-item">
                         <button class="btn btn-link text-light no-underline" onclick="showAboutPopup()">
                             <i class="fas fa-balance-scale text-primary"></i>
-                            Über
+                            &Uuml;ber
                         </button>
                     </li>
 
diff --git a/BeWoPlanerMobil/Web.config b/BeWoPlanerMobil/Web.config
index a849d0a49..aea689bce 100644
--- a/BeWoPlanerMobil/Web.config
+++ b/BeWoPlanerMobil/Web.config
@@ -220,7 +220,7 @@
             </namespaces>
         </pages>
         <httpHandlers>
-        <add type="DevExpress.Web.ASPxHttpHandlerModule, DevExpress.Web.v17.1, Version=17.1.4.0, Culture=neutral, PublicKeyToken=b88d1754d700e49a" />
+            <add type="DevExpress.Web.ASPxHttpHandlerModule, DevExpress.Web.v17.1, Version=17.1.4.0, Culture=neutral, PublicKeyToken=b88d1754d700e49a" />
             <add type="DevExpress.Web.ASPxUploadProgressHttpHandler, DevExpress.Web.v17.1, Version=17.1.4.0, Culture=neutral, PublicKeyToken=b88d1754d700e49a" verb="GET,POST" path="ASPxUploadProgressHandlerPage.ashx" validate="false" />
             <add validate="false" verb="GET,POST" path="DXXRDV.axd" type="DevExpress.Web.ASPxHttpHandlerModule, DevExpress.Web.v17.1, Version=17.1.4.0, Culture=neutral, PublicKeyToken=b88d1754d700e49a" />
             <add validate="false" verb="GET,POST" path="DXXRD.axd" type="DevExpress.Web.ASPxHttpHandlerModule, DevExpress.Web.v17.1, Version=17.1.4.0, Culture=neutral, PublicKeyToken=b88d1754d700e49a" />
diff --git a/Shared/Extensions/StringExtensions.cs b/Shared/Extensions/StringExtensions.cs
index 556df254b..c1a4795b1 100644
--- a/Shared/Extensions/StringExtensions.cs
+++ b/Shared/Extensions/StringExtensions.cs
@@ -79,5 +79,10 @@ namespace BS.Shared.Extensions
 
 			throw new ArgumentException("Not found.", "description");
 		}
+
+        public static string RemoveUppercaseEsszett(this string pString)
+        {
+            return pString?.Replace("ẞ", "ß");
+        }
     }
 }
\ No newline at end of file