diff --git a/Wino.Authentication/OutlookAuthenticator.cs b/Wino.Authentication/OutlookAuthenticator.cs
index 10bc5f26..7aa3113a 100644
--- a/Wino.Authentication/OutlookAuthenticator.cs
+++ b/Wino.Authentication/OutlookAuthenticator.cs
@@ -40,6 +40,7 @@ public class OutlookAuthenticator : BaseAuthenticator, IOutlookAuthenticator
             ListOperatingSystemAccounts = true,
         };
 
+
         var outlookAppBuilder = PublicClientApplicationBuilder.Create(AuthenticatorConfig.OutlookAuthenticatorClientId)
             .WithParentActivityOrWindow(nativeAppService.GetCoreWindowHwnd)
             .WithBroker(options)
diff --git a/Wino.Core.Domain/Interfaces/IFolderMenuItem.cs b/Wino.Core.Domain/Interfaces/IFolderMenuItem.cs
index 7deff38d..26413208 100644
--- a/Wino.Core.Domain/Interfaces/IFolderMenuItem.cs
+++ b/Wino.Core.Domain/Interfaces/IFolderMenuItem.cs
@@ -1,4 +1,5 @@
 using System.Collections.Generic;
+using System.Collections.ObjectModel;
 using Wino.Core.Domain.Entities.Shared;
 using Wino.Core.Domain.Enums;
 using Wino.Core.Domain.Models.Folders;
@@ -20,7 +21,7 @@ public interface IBaseFolderMenuItem : IMenuItem
     int UnreadItemCount { get; set; }
     SpecialFolderType SpecialFolderType { get; }
     IEnumerable<IMailItemFolder> HandlingFolders { get; }
-    IEnumerable<IMenuItem> SubMenuItems { get; }
+    ObservableCollection<IMenuItem> SubMenuItems { get; }
     bool IsMoveTarget { get; }
     bool IsSticky { get; }
     bool IsSystemFolder { get; }
diff --git a/Wino.Core.Domain/Interfaces/ISynchronizationManager.cs b/Wino.Core.Domain/Interfaces/ISynchronizationManager.cs
index c1ee65c6..0bcdb657 100644
--- a/Wino.Core.Domain/Interfaces/ISynchronizationManager.cs
+++ b/Wino.Core.Domain/Interfaces/ISynchronizationManager.cs
@@ -45,6 +45,11 @@ public interface ISynchronizationManager
     /// </summary>
     Task QueueRequestAsync(IRequestBase request, Guid accountId);
 
+    /// <summary>
+    /// Queues a mail action request to the corresponding account's synchronizer with optional synchronization triggering.
+    /// </summary>
+    Task QueueRequestAsync(IRequestBase request, Guid accountId, bool triggerSynchronization);
+
     /// <summary>
     /// Handles folder synchronization for the given account.
     /// </summary>
diff --git a/Wino.Core.Domain/MenuItems/FolderMenuItem.cs b/Wino.Core.Domain/MenuItems/FolderMenuItem.cs
index c5cbbf5d..d3f0fbc4 100644
--- a/Wino.Core.Domain/MenuItems/FolderMenuItem.cs
+++ b/Wino.Core.Domain/MenuItems/FolderMenuItem.cs
@@ -1,4 +1,5 @@
 using System.Collections.Generic;
+using System.Collections.ObjectModel;
 using System.Linq;
 using CommunityToolkit.Mvvm.ComponentModel;
 using Wino.Core.Domain.Entities.Shared;
@@ -20,6 +21,8 @@ public partial class FolderMenuItem : MenuItemBase<IMailItemFolder, FolderMenuIt
     public bool IsSticky => Parameter.IsSticky;
     public bool IsSystemFolder => Parameter.IsSystemFolder;
 
+
+
     /// <summary>
     /// Display name of the folder. More and Category folders have localized display names.
     /// </summary>
@@ -53,7 +56,7 @@ public partial class FolderMenuItem : MenuItemBase<IMailItemFolder, FolderMenuIt
 
     public bool ShowUnreadCount => Parameter.ShowUnreadCount;
 
-    IEnumerable<IMenuItem> IBaseFolderMenuItem.SubMenuItems => SubMenuItems;
+    public new ObservableCollection<IMenuItem> SubMenuItems { get; set; } = new ObservableCollection<IMenuItem>();
 
     public FolderMenuItem(IMailItemFolder folderStructure, MailAccount parentAccount, IMenuItem parentMenuItem) : base(folderStructure, folderStructure.Id, parentMenuItem)
     {
diff --git a/Wino.Core.WinUI/Services/DialogServiceBase.cs b/Wino.Core.WinUI/Services/DialogServiceBase.cs
index 9e917f72..8d90f1f4 100644
--- a/Wino.Core.WinUI/Services/DialogServiceBase.cs
+++ b/Wino.Core.WinUI/Services/DialogServiceBase.cs
@@ -37,6 +37,11 @@ public class DialogServiceBase : IDialogServiceBase
         ApplicationResourceManager = applicationResourceManager;
     }
 
+    protected XamlRoot GetXamlRoot()
+    {
+        return WinoApplication.MainWindow?.Content?.XamlRoot;
+    }
+
     public async Task<string> PickFilePathAsync(string saveFileName)
     {
         var picker = new FolderPicker()
@@ -122,7 +127,8 @@ public class DialogServiceBase : IDialogServiceBase
     {
         return new AccountCreationDialog
         {
-            RequestedTheme = ThemeService.RootTheme.ToWindowsElementTheme()
+            RequestedTheme = ThemeService.RootTheme.ToWindowsElementTheme(),
+            XamlRoot = GetXamlRoot()
         };
     }
 
@@ -195,6 +201,8 @@ public class DialogServiceBase : IDialogServiceBase
 
         try
         {
+            dialog.XamlRoot = GetXamlRoot();
+
             return await dialog.ShowAsync();
         }
         catch (Exception ex)
diff --git a/Wino.Core.WinUI/Services/NativeAppService.cs b/Wino.Core.WinUI/Services/NativeAppService.cs
index b05ca9a3..59e7606d 100644
--- a/Wino.Core.WinUI/Services/NativeAppService.cs
+++ b/Wino.Core.WinUI/Services/NativeAppService.cs
@@ -1,10 +1,8 @@
 using System;
 using System.Threading.Tasks;
 using Windows.ApplicationModel;
-using Windows.Foundation.Metadata;
 using Windows.Storage;
 using Windows.System;
-using Windows.UI.Shell;
 using Wino.Core.Domain.Interfaces;
 
 
@@ -88,20 +86,21 @@ public class NativeAppService : INativeAppService
         return string.Format("{0}.{1}.{2}.{3}", version.Major, version.Minor, version.Build, version.Revision);
     }
 
+    [Obsolete("Not supported for Win SDK")]
     public async Task PinAppToTaskbarAsync()
     {
         // If Start screen manager API's aren't present
-        if (!ApiInformation.IsTypePresent("Windows.UI.Shell.TaskbarManager")) return;
+        //if (!ApiInformation.IsTypePresent("Windows.UI.Shell.TaskbarManager")) return;
 
-        // Get the taskbar manager
-        var taskbarManager = TaskbarManager.GetDefault();
+        //// Get the taskbar manager
+        //var taskbarManager = TaskbarManager.GetDefault();
 
-        // If Taskbar doesn't allow pinning, don't show the tip
-        if (!taskbarManager.IsPinningAllowed) return;
+        //// If Taskbar doesn't allow pinning, don't show the tip
+        //if (!taskbarManager.IsPinningAllowed) return;
 
-        // If already pinned, don't show the tip
-        if (await taskbarManager.IsCurrentAppPinnedAsync()) return;
+        //// If already pinned, don't show the tip
+        //if (await taskbarManager.IsCurrentAppPinnedAsync()) return;
 
-        await taskbarManager.RequestPinCurrentAppAsync();
+        //await taskbarManager.RequestPinCurrentAppAsync();
     }
 }
diff --git a/Wino.Core.WinUI/Services/NewThemeService.cs b/Wino.Core.WinUI/Services/NewThemeService.cs
index 340a61f3..b019b1db 100644
--- a/Wino.Core.WinUI/Services/NewThemeService.cs
+++ b/Wino.Core.WinUI/Services/NewThemeService.cs
@@ -198,8 +198,10 @@ public class NewThemeService : INewThemeService
         await ApplyCustomThemeAsync(true);
 
         // Registering to color changes, thus we notice when user changes theme system wide
-        uiSettings.ColorValuesChanged -= UISettingsColorChanged;
-        uiSettings.ColorValuesChanged += UISettingsColorChanged;
+
+        // TODO: WinUI: This event seems to be very unreliable. It causes a crash when the function runs under.
+        //uiSettings.ColorValuesChanged -= UISettingsColorChanged;
+        //uiSettings.ColorValuesChanged += UISettingsColorChanged;
 
         isInitialized = true;
     }
diff --git a/Wino.Core.WinUI/Services/PreferencesService.cs b/Wino.Core.WinUI/Services/PreferencesService.cs
index 215daacc..14557fa6 100644
--- a/Wino.Core.WinUI/Services/PreferencesService.cs
+++ b/Wino.Core.WinUI/Services/PreferencesService.cs
@@ -227,7 +227,7 @@ public class PreferencesService(IConfigurationService configurationService) : Ob
     public bool IsNavigationPaneOpened
     {
         get => _configurationService.Get(nameof(IsNavigationPaneOpened), true);
-        set => SaveProperty(propertyName: nameof(IsNavigationPaneOpened), value);
+        set => SetPropertyAndSave(propertyName: nameof(IsNavigationPaneOpened), value);
     }
 
     public bool AutoSelectNextItem
diff --git a/Wino.Core/Services/SynchronizationManager.cs b/Wino.Core/Services/SynchronizationManager.cs
index 2f8f453e..3c50c939 100644
--- a/Wino.Core/Services/SynchronizationManager.cs
+++ b/Wino.Core/Services/SynchronizationManager.cs
@@ -194,6 +194,17 @@ public class SynchronizationManager : ISynchronizationManager
     /// <param name="request">Request to queue</param>
     /// <param name="accountId">Account ID to queue the request for</param>
     public async Task QueueRequestAsync(IRequestBase request, Guid accountId)
+    {
+        await QueueRequestAsync(request, accountId, triggerSynchronization: true);
+    }
+
+    /// <summary>
+    /// Queues a mail action request to the corresponding account's synchronizer with optional synchronization triggering.
+    /// </summary>
+    /// <param name="request">Request to queue</param>
+    /// <param name="accountId">Account ID to queue the request for</param>
+    /// <param name="triggerSynchronization">Whether to automatically trigger synchronization after queuing the request</param>
+    public async Task QueueRequestAsync(IRequestBase request, Guid accountId, bool triggerSynchronization)
     {
         EnsureInitialized();
 
@@ -208,6 +219,32 @@ public class SynchronizationManager : ISynchronizationManager
                      request.GetType().Name, accountId);
 
         synchronizer.QueueRequest(request);
+
+        if (triggerSynchronization)
+        {
+            // Trigger synchronization to execute the queued request
+            _logger.Debug("Triggering synchronization to execute queued request for account {AccountId}", accountId);
+            
+            var synchronizationOptions = new MailSynchronizationOptions()
+            {
+                AccountId = accountId,
+                Type = MailSynchronizationType.ExecuteRequests
+            };
+
+            // Trigger synchronization asynchronously without waiting for completion
+            // This matches the pattern used in WinoRequestDelegator
+            _ = Task.Run(async () =>
+            {
+                try
+                {
+                    await SynchronizeMailAsync(synchronizationOptions);
+                }
+                catch (Exception ex)
+                {
+                    _logger.Error(ex, "Failed to execute synchronization after queuing request for account {AccountId}", accountId);
+                }
+            });
+        }
     }
 
     /// <summary>
diff --git a/Wino.Core/Services/WinoRequestDelegator.cs b/Wino.Core/Services/WinoRequestDelegator.cs
index 7686a9c9..cd3c31a7 100644
--- a/Wino.Core/Services/WinoRequestDelegator.cs
+++ b/Wino.Core/Services/WinoRequestDelegator.cs
@@ -135,7 +135,8 @@ public class WinoRequestDelegator : IWinoRequestDelegator
 
     private async Task QueueRequestAsync(IRequestBase request, Guid accountId)
     {
-        await SynchronizationManager.Instance.QueueRequestAsync(request, accountId);
+        // Don't trigger synchronization for individual requests - we'll trigger it once for all requests
+        await SynchronizationManager.Instance.QueueRequestAsync(request, accountId, triggerSynchronization: false);
     }
 
     private Task QueueSynchronizationAsync(Guid accountId)
diff --git a/Wino.Mail.WinUI/App.xaml.cs b/Wino.Mail.WinUI/App.xaml.cs
index a2d97c06..bddf800b 100644
--- a/Wino.Mail.WinUI/App.xaml.cs
+++ b/Wino.Mail.WinUI/App.xaml.cs
@@ -83,18 +83,21 @@ public partial class App : WinoApplication, IRecipient<NewMailSynchronizationReq
         // TODO: Check app relaunch mutex before loading anything.
 
         // Initialize NewThemeService first to get backdrop settings before creating window
-        var newThemeService = Services.GetService<INewThemeService>();
-        var configService = Services.GetService<IConfigurationService>();
+        var newThemeService = Services.GetRequiredService<INewThemeService>();
+        var configService = Services.GetRequiredService<IConfigurationService>();
+        var nativeAppService = Services.GetRequiredService<INativeAppService>();
 
         // Load saved backdrop type before creating window
         var savedBackdropType = (WindowBackdropType)configService.Get("WindowBackdropTypeKey", (int)WindowBackdropType.Mica);
 
         MainWindow = new ShellWindow();
 
+        nativeAppService.GetCoreWindowHwnd = () => WinRT.Interop.WindowNative.GetWindowHandle(MainWindow);
+
         await InitializeServicesAsync();
 
         // Initialize system tray
-        var systemTrayService = Services.GetService<ISystemTrayService>();
+        var systemTrayService = Services.GetRequiredService<ISystemTrayService>();
         if (systemTrayService != null)
         {
             systemTrayService.Initialize();
diff --git a/Wino.Mail.WinUI/Services/DialogService.cs b/Wino.Mail.WinUI/Services/DialogService.cs
index 5ca49e69..8ad6ac92 100644
--- a/Wino.Mail.WinUI/Services/DialogService.cs
+++ b/Wino.Mail.WinUI/Services/DialogService.cs
@@ -37,9 +37,11 @@ public class DialogService : DialogServiceBase, IMailDialogService
         {
             if (accountCreationDialogResult.ProviderType == MailProviderType.IMAP4)
             {
+
                 return new NewImapSetupDialog
                 {
-                    RequestedTheme = ThemeService.RootTheme.ToWindowsElementTheme()
+                    RequestedTheme = ThemeService.RootTheme.ToWindowsElementTheme(),
+                    XamlRoot = GetXamlRoot()
                 };
             }
             else
diff --git a/Wino.Mail.WinUI/ShellWindow.xaml b/Wino.Mail.WinUI/ShellWindow.xaml
index 5cdb6a86..858a2253 100644
--- a/Wino.Mail.WinUI/ShellWindow.xaml
+++ b/Wino.Mail.WinUI/ShellWindow.xaml
@@ -21,6 +21,7 @@
         <TitleBar
             x:Name="ShellTitleBar"
             Title="{x:Bind StatePersistanceService.CoreWindowTitle, Mode=OneWay}"
+            Margin="-3,-3,0,0"
             HorizontalContentAlignment="Stretch"
             VerticalContentAlignment="Stretch"
             BackRequested="BackButtonClicked"
diff --git a/Wino.Mail.WinUI/Views/MailListPage.xaml b/Wino.Mail.WinUI/Views/MailListPage.xaml
index dab1109a..eb99052e 100644
--- a/Wino.Mail.WinUI/Views/MailListPage.xaml
+++ b/Wino.Mail.WinUI/Views/MailListPage.xaml
@@ -209,7 +209,7 @@
         <KeyboardAccelerator Key="Delete" Invoked="DeleteAllInvoked" />
     </Page.KeyboardAccelerators>
     <wino:BasePage.ShellContent>
-        <Grid HorizontalAlignment="Stretch" Background="Red">
+        <Grid HorizontalAlignment="Stretch">
             <!--  Hidden focus receiver...  -->
             <TextBox
                 Grid.Column="1"