diff --git a/Wino.Core.Domain/Models/Synchronization/SynchronizationActionItem.cs b/Wino.Core.Domain/Models/Synchronization/SynchronizationActionItem.cs
new file mode 100644
index 00000000..655e8918
--- /dev/null
+++ b/Wino.Core.Domain/Models/Synchronization/SynchronizationActionItem.cs
@@ -0,0 +1,15 @@
+using System;
+
+namespace Wino.Core.Domain.Models.Synchronization;
+
+/// <summary>
+/// Represents a single grouped synchronization action displayed in the sync status flyout.
+/// For example: "Deleting 3 mail(s)" or "Marking folder as read".
+/// </summary>
+public class SynchronizationActionItem
+{
+    public Guid Id { get; set; } = Guid.NewGuid();
+    public Guid AccountId { get; set; }
+    public string AccountName { get; set; }
+    public string Description { get; set; }
+}
diff --git a/Wino.Core.Domain/Translations/en_US/resources.json b/Wino.Core.Domain/Translations/en_US/resources.json
index 613221ac..4ba0ed11 100644
--- a/Wino.Core.Domain/Translations/en_US/resources.json
+++ b/Wino.Core.Domain/Translations/en_US/resources.json
@@ -84,6 +84,22 @@
     "Buttons_Yes": "Yes",
     "Sync_SynchronizingFolder": "Synchronizing {0} {1}%",
     "Sync_DownloadedMessages": "Downloaded {0} messages from {1}",
+    "SyncAction_Archiving": "Archiving {0} mail(s)",
+    "SyncAction_ClearingFlag": "Unflagging {0} mail(s)",
+    "SyncAction_CreatingDraft": "Creating draft",
+    "SyncAction_Deleting": "Deleting {0} mail(s)",
+    "SyncAction_EmptyingFolder": "Emptying folder",
+    "SyncAction_MarkingAsRead": "Marking {0} mail(s) as read",
+    "SyncAction_MarkingAsUnread": "Marking {0} mail(s) as unread",
+    "SyncAction_MarkingFolderAsRead": "Marking folder as read",
+    "SyncAction_Moving": "Moving {0} mail(s)",
+    "SyncAction_MovingToFocused": "Moving {0} mail(s) to Focused",
+    "SyncAction_RenamingFolder": "Renaming folder",
+    "SyncAction_SendingMail": "Sending mail",
+    "SyncAction_SettingFlag": "Flagging {0} mail(s)",
+    "SyncAction_SynchronizingAccount": "Synchronizing {0}",
+    "SyncAction_SynchronizingAccounts": "Synchronizing {0} account(s)",
+    "SyncAction_Unarchiving": "Unarchiving {0} mail(s)",
     "CalendarAllDayEventSummary": "all-day events",
     "CalendarDisplayOptions_Color": "Color",
     "CalendarDisplayOptions_Expand": "Expand",
diff --git a/Wino.Core/Helpers/SynchronizationActionHelper.cs b/Wino.Core/Helpers/SynchronizationActionHelper.cs
new file mode 100644
index 00000000..87985236
--- /dev/null
+++ b/Wino.Core/Helpers/SynchronizationActionHelper.cs
@@ -0,0 +1,108 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using Wino.Core.Domain;
+using Wino.Core.Domain.Enums;
+using Wino.Core.Domain.Interfaces;
+using Wino.Core.Domain.Models.Synchronization;
+using Wino.Core.Requests.Folder;
+using Wino.Core.Requests.Mail;
+
+namespace Wino.Core.Helpers;
+
+/// <summary>
+/// Converts queued synchronization requests into user-facing action descriptions.
+/// </summary>
+public static class SynchronizationActionHelper
+{
+    public static List<SynchronizationActionItem> CreateActionItems(
+        IEnumerable<IRequestBase> requests, Guid accountId, string accountName)
+    {
+        var items = new List<SynchronizationActionItem>();
+
+        // Group mail action requests by operation
+        var mailRequests = requests.OfType<IMailActionRequest>();
+        var mailGroups = mailRequests.GroupBy(r => GetMailActionKey(r));
+
+        foreach (var group in mailGroups)
+        {
+            var description = GetMailActionDescription(group.Key, group.ToList());
+
+            if (description != null)
+            {
+                items.Add(new SynchronizationActionItem
+                {
+                    AccountId = accountId,
+                    AccountName = accountName,
+                    Description = description
+                });
+            }
+        }
+
+        // Handle folder action requests individually
+        var folderRequests = requests.OfType<IFolderActionRequest>();
+        foreach (var folderRequest in folderRequests)
+        {
+            var description = GetFolderActionDescription(folderRequest);
+
+            if (description != null)
+            {
+                items.Add(new SynchronizationActionItem
+                {
+                    AccountId = accountId,
+                    AccountName = accountName,
+                    Description = description
+                });
+            }
+        }
+
+        return items;
+    }
+
+    /// <summary>
+    /// Returns a key that differentiates MarkRead vs MarkUnread, Flag vs Unflag, Archive vs Unarchive.
+    /// </summary>
+    private static string GetMailActionKey(IMailActionRequest request)
+    {
+        return request switch
+        {
+            MarkReadRequest r => r.IsRead ? "MarkRead" : "MarkUnread",
+            ChangeFlagRequest r => r.IsFlagged ? "SetFlag" : "ClearFlag",
+            ArchiveRequest r => r.IsArchiving ? "Archive" : "Unarchive",
+            _ => request.Operation.ToString()
+        };
+    }
+
+    private static string GetMailActionDescription(string actionKey, List<IMailActionRequest> requests)
+    {
+        int count = requests.Count;
+
+        return actionKey switch
+        {
+            "MarkRead" => string.Format(Translator.SyncAction_MarkingAsRead, count),
+            "MarkUnread" => string.Format(Translator.SyncAction_MarkingAsUnread, count),
+            "Delete" => string.Format(Translator.SyncAction_Deleting, count),
+            "Move" => string.Format(Translator.SyncAction_Moving, count),
+            "Archive" => string.Format(Translator.SyncAction_Archiving, count),
+            "Unarchive" => string.Format(Translator.SyncAction_Unarchiving, count),
+            "SetFlag" => string.Format(Translator.SyncAction_SettingFlag, count),
+            "ClearFlag" => string.Format(Translator.SyncAction_ClearingFlag, count),
+            "CreateDraft" => Translator.SyncAction_CreatingDraft,
+            "Send" => Translator.SyncAction_SendingMail,
+            "MoveToFocused" => string.Format(Translator.SyncAction_MovingToFocused, count),
+            "AlwaysMoveTo" => string.Format(Translator.SyncAction_Moving, count),
+            _ => null
+        };
+    }
+
+    private static string GetFolderActionDescription(IFolderActionRequest request)
+    {
+        return request switch
+        {
+            RenameFolderRequest => Translator.SyncAction_RenamingFolder,
+            EmptyFolderRequest => Translator.SyncAction_EmptyingFolder,
+            MarkFolderAsReadRequest => Translator.SyncAction_MarkingFolderAsRead,
+            _ => null
+        };
+    }
+}
diff --git a/Wino.Core/Services/WinoRequestDelegator.cs b/Wino.Core/Services/WinoRequestDelegator.cs
index 693826b1..35ca5edc 100644
--- a/Wino.Core/Services/WinoRequestDelegator.cs
+++ b/Wino.Core/Services/WinoRequestDelegator.cs
@@ -13,9 +13,11 @@ using Wino.Core.Domain.Models.Calendar;
 using Wino.Core.Domain.Models.Folders;
 using Wino.Core.Domain.Models.MailItem;
 using Wino.Core.Domain.Models.Synchronization;
+using Wino.Core.Helpers;
 using Wino.Core.Requests.Calendar;
 using Wino.Core.Requests.Mail;
 using Wino.Messaging.Server;
+using Wino.Messaging.UI;
 
 namespace Wino.Core.Services;
 
@@ -24,14 +26,17 @@ public class WinoRequestDelegator : IWinoRequestDelegator
     private readonly IWinoRequestProcessor _winoRequestProcessor;
     private readonly IFolderService _folderService;
     private readonly IMailDialogService _dialogService;
+    private readonly IAccountService _accountService;
 
     public WinoRequestDelegator(IWinoRequestProcessor winoRequestProcessor,
                                 IFolderService folderService,
-                                IMailDialogService dialogService)
+                                IMailDialogService dialogService,
+                                IAccountService accountService)
     {
         _winoRequestProcessor = winoRequestProcessor;
         _folderService = folderService;
         _dialogService = dialogService;
+        _accountService = accountService;
     }
 
     public async Task ExecuteAsync(MailOperationPreperationRequest request)
@@ -82,14 +87,20 @@ public class WinoRequestDelegator : IWinoRequestDelegator
         var accountIds = requests.GroupBy(a => a.Item.AssignedAccount.Id);
 
         // Queue requests for each account and start synchronization.
-        foreach (var accountId in accountIds)
+        foreach (var accountGroup in accountIds)
         {
-            foreach (var accountRequest in accountId)
+            foreach (var accountRequest in accountGroup)
             {
-                await QueueRequestAsync(accountRequest, accountId.Key);
+                await QueueRequestAsync(accountRequest, accountGroup.Key);
             }
 
-            await QueueSynchronizationAsync(accountId.Key);
+            var account = accountGroup.First().Item.AssignedAccount;
+            var actionItems = SynchronizationActionHelper.CreateActionItems(accountGroup, accountGroup.Key, account.Name);
+
+            if (actionItems.Count > 0)
+                WeakReferenceMessenger.Default.Send(new SynchronizationActionsAdded(accountGroup.Key, account.Name, actionItems));
+
+            await QueueSynchronizationAsync(accountGroup.Key);
         }
     }
 
@@ -117,23 +128,28 @@ public class WinoRequestDelegator : IWinoRequestDelegator
         if (request == null) return;
 
         await QueueRequestAsync(request, accountId);
+        await SendSyncActionsAddedAsync([request], accountId);
         await QueueSynchronizationAsync(accountId);
     }
 
     public async Task ExecuteAsync(DraftPreparationRequest draftPreperationRequest)
     {
         var request = new CreateDraftRequest(draftPreperationRequest);
+        var accountId = draftPreperationRequest.Account.Id;
 
-        await QueueRequestAsync(request, draftPreperationRequest.Account.Id);
-        await QueueSynchronizationAsync(draftPreperationRequest.Account.Id);
+        await QueueRequestAsync(request, accountId);
+        await SendSyncActionsAddedAsync([request], accountId, draftPreperationRequest.Account.Name);
+        await QueueSynchronizationAsync(accountId);
     }
 
     public async Task ExecuteAsync(SendDraftPreparationRequest sendDraftPreperationRequest)
     {
         var request = new SendDraftRequest(sendDraftPreperationRequest);
+        var account = sendDraftPreperationRequest.MailItem.AssignedAccount;
 
-        await QueueRequestAsync(request, sendDraftPreperationRequest.MailItem.AssignedAccount.Id);
-        await QueueSynchronizationAsync(sendDraftPreperationRequest.MailItem.AssignedAccount.Id);
+        await QueueRequestAsync(request, account.Id);
+        await SendSyncActionsAddedAsync([request], account.Id, account.Name);
+        await QueueSynchronizationAsync(account.Id);
     }
 
     public async Task ExecuteAsync(CalendarOperationPreparationRequest calendarPreparationRequest)
@@ -187,6 +203,20 @@ public class WinoRequestDelegator : IWinoRequestDelegator
         return Task.CompletedTask;
     }
 
+    private async Task SendSyncActionsAddedAsync(IEnumerable<IRequestBase> requests, Guid accountId, string accountName = null)
+    {
+        if (accountName == null)
+        {
+            var account = await _accountService.GetAccountAsync(accountId);
+            accountName = account?.Name ?? string.Empty;
+        }
+
+        var actionItems = SynchronizationActionHelper.CreateActionItems(requests, accountId, accountName);
+
+        if (actionItems.Count > 0)
+            WeakReferenceMessenger.Default.Send(new SynchronizationActionsAdded(accountId, accountName, actionItems));
+    }
+
     private Task QueueCalendarSynchronizationAsync(Guid accountId)
     {
         var options = new CalendarSynchronizationOptions()
diff --git a/Wino.Core/Synchronizers/WinoSynchronizer.cs b/Wino.Core/Synchronizers/WinoSynchronizer.cs
index 432ac1e6..ecd96502 100644
--- a/Wino.Core/Synchronizers/WinoSynchronizer.cs
+++ b/Wino.Core/Synchronizers/WinoSynchronizer.cs
@@ -215,6 +215,8 @@ public abstract class WinoSynchronizer<TBaseRequest, TMessageType, TCalendarEven
 
                 await ExecuteNativeRequestsAsync(nativeRequests, activeSynchronizationCancellationToken).ConfigureAwait(false);
 
+                Messenger.Send(new SynchronizationActionsCompleted(Account.Id));
+
                 PublishUnreadItemChanges();
 
                 // Execute request sync options should be re-calculated after execution.
@@ -399,6 +401,8 @@ public abstract class WinoSynchronizer<TBaseRequest, TMessageType, TCalendarEven
 
             await ExecuteNativeRequestsAsync(nativeRequests, cancellationToken).ConfigureAwait(false);
 
+            Messenger.Send(new SynchronizationActionsCompleted(Account.Id));
+
             // Let servers to finish their job. Sometimes the servers don't respond immediately.
             shouldDelayExecution = requestCopies.Any(a => a.ResynchronizationDelay > 0);
 
diff --git a/Wino.Mail.WinUI/ShellWindow.xaml b/Wino.Mail.WinUI/ShellWindow.xaml
index 3ae6a173..23fa2770 100644
--- a/Wino.Mail.WinUI/ShellWindow.xaml
+++ b/Wino.Mail.WinUI/ShellWindow.xaml
@@ -9,6 +9,7 @@
     xmlns:local="using:Wino.Mail.WinUI"
     xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
     xmlns:notifyicon="using:H.NotifyIcon"
+    xmlns:syncModels="using:Wino.Core.Domain.Models.Synchronization"
     xmlns:winuiex="using:WinUIEx"
     Title="ShellWindow"
     mc:Ignorable="d">
@@ -34,7 +35,58 @@
             IsPaneToggleButtonVisible="True"
             PaneToggleRequested="PaneButtonClicked">
             <TitleBar.RightHeader>
-                <Grid>
+                <StackPanel Orientation="Horizontal" Spacing="8">
+                    <!--  Sync Status Button  -->
+                    <Button
+                        x:Name="SyncStatusButton"
+                        Padding="8,4"
+                        VerticalAlignment="Center"
+                        Background="Transparent"
+                        BorderThickness="0"
+                        Visibility="Collapsed">
+                        <StackPanel Orientation="Horizontal" Spacing="6">
+                            <ProgressRing
+                                Width="16"
+                                Height="16"
+                                IsActive="True" />
+                            <TextBlock
+                                x:Name="SyncStatusText"
+                                VerticalAlignment="Center"
+                                Style="{StaticResource CaptionTextBlockStyle}" />
+                        </StackPanel>
+                        <Button.Flyout>
+                            <Flyout x:Name="SyncStatusFlyout" Placement="Bottom">
+                                <ItemsRepeater x:Name="SyncActionsRepeater" ItemsSource="{x:Bind SyncActionItems}">
+                                    <ItemsRepeater.ItemTemplate>
+                                        <DataTemplate x:DataType="syncModels:SynchronizationActionItem">
+                                            <Grid
+                                                MinWidth="280"
+                                                MaxWidth="400"
+                                                Padding="0,6"
+                                                ColumnSpacing="8">
+                                                <Grid.ColumnDefinitions>
+                                                    <ColumnDefinition Width="Auto" />
+                                                    <ColumnDefinition Width="*" />
+                                                </Grid.ColumnDefinitions>
+                                                <ProgressRing
+                                                    Width="16"
+                                                    Height="16"
+                                                    IsActive="True" />
+                                                <StackPanel Grid.Column="1">
+                                                    <TextBlock
+                                                        Foreground="{ThemeResource TextFillColorSecondaryBrush}"
+                                                        Style="{StaticResource CaptionTextBlockStyle}"
+                                                        Text="{x:Bind AccountName}" />
+                                                    <TextBlock Text="{x:Bind Description}" TextWrapping="Wrap" />
+                                                </StackPanel>
+                                            </Grid>
+                                        </DataTemplate>
+                                    </ItemsRepeater.ItemTemplate>
+                                </ItemsRepeater>
+                            </Flyout>
+                        </Button.Flyout>
+                    </Button>
+                    <!--  Mail/Calendar Mode Switcher  -->
                     <controls:Segmented x:Name="AppModeSegmentedControl" SelectionChanged="SegmentedChanged">
                         <controls:SegmentedItem>
                             <controls:SegmentedItem.Icon>
@@ -53,7 +105,7 @@
                             </controls:SegmentedItem.Icon>
                         </controls:SegmentedItem>
                     </controls:Segmented>
-                </Grid>
+                </StackPanel>
             </TitleBar.RightHeader>
         </TitleBar>
 
diff --git a/Wino.Mail.WinUI/ShellWindow.xaml.cs b/Wino.Mail.WinUI/ShellWindow.xaml.cs
index 2d47b747..2c7f6b9d 100644
--- a/Wino.Mail.WinUI/ShellWindow.xaml.cs
+++ b/Wino.Mail.WinUI/ShellWindow.xaml.cs
@@ -1,4 +1,6 @@
 using System;
+using System.Collections.ObjectModel;
+using System.Linq;
 using System.Windows.Input;
 using CommunityToolkit.Mvvm.Input;
 using CommunityToolkit.Mvvm.Messaging;
@@ -7,7 +9,9 @@ using Microsoft.Extensions.DependencyInjection;
 using Microsoft.UI.Xaml;
 using Microsoft.UI.Xaml.Controls;
 using Windows.UI;
+using Wino.Core.Domain;
 using Wino.Core.Domain.Interfaces;
+using Wino.Core.Domain.Models.Synchronization;
 using Wino.Mail.WinUI.Interfaces;
 using Wino.Messaging.Client.Shell;
 using Wino.Messaging.UI;
@@ -16,7 +20,11 @@ using WinUIEx;
 
 namespace Wino.Mail.WinUI;
 
-public sealed partial class ShellWindow : WindowEx, IWinoShellWindow, IRecipient<ApplicationThemeChanged>, IRecipient<TitleBarShellContentUpdated>
+public sealed partial class ShellWindow : WindowEx, IWinoShellWindow,
+    IRecipient<ApplicationThemeChanged>,
+    IRecipient<TitleBarShellContentUpdated>,
+    IRecipient<SynchronizationActionsAdded>,
+    IRecipient<SynchronizationActionsCompleted>
 {
     public IStatePersistanceService StatePersistanceService { get; } = WinoApplication.Current.Services.GetService<IStatePersistanceService>() ?? throw new Exception("StatePersistanceService not registered in DI container.");
     public IPreferencesService PreferencesService { get; } = WinoApplication.Current.Services.GetService<IPreferencesService>() ?? throw new Exception("PreferencesService not registered in DI container.");
@@ -25,6 +33,8 @@ public sealed partial class ShellWindow : WindowEx, IWinoShellWindow, IRecipient
     public ICommand ShowWinoCommand { get; set; }
     public ICommand ExitWinoCommand { get; set; }
 
+    public ObservableCollection<SynchronizationActionItem> SyncActionItems { get; } = new();
+
     public ShellWindow()
     {
         RegisterRecipients();
@@ -172,6 +182,46 @@ public sealed partial class ShellWindow : WindowEx, IWinoShellWindow, IRecipient
         UpdateTitleBarColors(message.IsUnderlyingThemeDark);
     }
 
+    public void Receive(SynchronizationActionsAdded message)
+    {
+        DispatcherQueue.TryEnqueue(() =>
+        {
+            foreach (var action in message.Actions)
+                SyncActionItems.Add(action);
+
+            UpdateSyncStatusVisibility();
+        });
+    }
+
+    public void Receive(SynchronizationActionsCompleted message)
+    {
+        DispatcherQueue.TryEnqueue(() =>
+        {
+            var toRemove = SyncActionItems.Where(a => a.AccountId == message.AccountId).ToList();
+
+            foreach (var item in toRemove)
+                SyncActionItems.Remove(item);
+
+            UpdateSyncStatusVisibility();
+        });
+    }
+
+    private void UpdateSyncStatusVisibility()
+    {
+        SyncStatusButton.Visibility = SyncActionItems.Any()
+            ? Visibility.Visible
+            : Visibility.Collapsed;
+
+        var distinctAccounts = SyncActionItems.Select(a => a.AccountId).Distinct().Count();
+
+        SyncStatusText.Text = distinctAccounts switch
+        {
+            0 => string.Empty,
+            1 => string.Format(Translator.SyncAction_SynchronizingAccount, SyncActionItems.First().AccountName),
+            _ => string.Format(Translator.SyncAction_SynchronizingAccounts, distinctAccounts)
+        };
+    }
+
     private void UpdateTitleBarColors(bool isDarkTheme)
     {
         DispatcherQueue.TryEnqueue(() =>
@@ -250,12 +300,16 @@ public sealed partial class ShellWindow : WindowEx, IWinoShellWindow, IRecipient
     {
         WeakReferenceMessenger.Default.Register<TitleBarShellContentUpdated>(this);
         WeakReferenceMessenger.Default.Register<ApplicationThemeChanged>(this);
+        WeakReferenceMessenger.Default.Register<SynchronizationActionsAdded>(this);
+        WeakReferenceMessenger.Default.Register<SynchronizationActionsCompleted>(this);
     }
 
     private void UnregisterRecipients()
     {
         WeakReferenceMessenger.Default.Unregister<TitleBarShellContentUpdated>(this);
         WeakReferenceMessenger.Default.Unregister<ApplicationThemeChanged>(this);
+        WeakReferenceMessenger.Default.Unregister<SynchronizationActionsAdded>(this);
+        WeakReferenceMessenger.Default.Unregister<SynchronizationActionsCompleted>(this);
     }
 
     private void SegmentedChanged(object sender, SelectionChangedEventArgs e)
diff --git a/Wino.Messages/UI/SynchronizationActionsAdded.cs b/Wino.Messages/UI/SynchronizationActionsAdded.cs
new file mode 100644
index 00000000..7655d884
--- /dev/null
+++ b/Wino.Messages/UI/SynchronizationActionsAdded.cs
@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+using Wino.Core.Domain.Models.Synchronization;
+
+namespace Wino.Messaging.UI;
+
+/// <summary>
+/// Sent when synchronization requests are queued for an account.
+/// Contains grouped action descriptions for the UI to display.
+/// </summary>
+public record SynchronizationActionsAdded(
+    Guid AccountId,
+    string AccountName,
+    List<SynchronizationActionItem> Actions) : UIMessageBase<SynchronizationActionsAdded>;
diff --git a/Wino.Messages/UI/SynchronizationActionsCompleted.cs b/Wino.Messages/UI/SynchronizationActionsCompleted.cs
new file mode 100644
index 00000000..e5a04b39
--- /dev/null
+++ b/Wino.Messages/UI/SynchronizationActionsCompleted.cs
@@ -0,0 +1,9 @@
+using System;
+
+namespace Wino.Messaging.UI;
+
+/// <summary>
+/// Sent when all queued synchronization requests for an account have been executed.
+/// </summary>
+public record SynchronizationActionsCompleted(
+    Guid AccountId) : UIMessageBase<SynchronizationActionsCompleted>;