Cannot sync with outlook calendar

I too have this Calendar issue. I have also tried the Repair option,(now I have a blank calendar, even though the events are still there in Outlook.com).
@Gary - perhaps a log listing will help you reproduce/diagnose this …
-----------Start log---------
10:20:10 AM Outlook email [AirSync] MailClient.Accounts.ConnectionException: Found invalid data while decoding.
—> System.IO.InvalidDataException: Found invalid data while decoding.
at MailClient.Protocols.AirSync.AirSyncItemSynchronizer2.GetSyncKey(Folder folder, IItemContext context, CancellationToken cancellationToken) at MailClient.Protocols.AirSync.AirSyncItemSynchronizer2.Synchronize(IItemSynchronizeContext1 synchronizeContext, Folder folder, CancellationToken cancellationToken) at MailClient.Protocols.Common.ItemSynchronizer2.<>c__DisplayClass40_2.b__6(WorkerStatus status, CancellationToken ct)
at MailClient.Protocols.AirSync.AirSyncGenericCommand.Execute(WorkerStatus status)
— End of inner exception stack trace —
at MailClient.Protocols.AirSync.AirSyncGenericCommand.Execute(WorkerStatus status)
at MailClient.Commands.Command.Process(WorkerStatus status)
AccountId = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
AccountName = Outlook email
RunInPlace = False
EnqueuedStackTrace =
at MailClient.Protocols.Common.ItemSynchronizer2.<>c__DisplayClass40_0.<EnqueueSynchronize>b__0() at MailClient.Protocols.Common.AccountBase.RunIfOnline(Action actionIfOnline, Action actionIfOffline) at MailClient.Protocols.Common.ItemSynchronizer2.Synchronize(Folder folder, SynchronizationPriority priority, Action1 completed) at MailClient.Storage.Application.ItemCollection2.Synchronize(SynchronizationPriority priority, Action`1 completed, Boolean fromUI)
at MailClient.Storage.Application.Folder.Synchronize(SynchronizationPriority priority, Boolean fromUI)
at MailClient.Protocols.Common.FolderSynchronizer.FolderActivated(Folder folder, Boolean goingOnline)
at MailClient.Protocols.Common.FolderSynchronizer.GoOnlinePost()
at MailClient.Protocols.AirSync.AirSyncAccount.GoOnlineInt()
at MailClient.Protocols.Common.AccountBase.ChangeOnlineState(Boolean online, OfflineReason offlineReason)
at MailClient.Protocols.Common.AccountBase.GoOnline()
at MailClient.Protocols.Common.AccountBase.RunIfOnline(Action actionIfOnline, Action actionIfOffline)
at MailClient.Protocols.AirSync.AirSyncAccount.Synchronize(SynchronizationPriority priority)
at MailClient.Accounts.BindingAccountBase.Receive()
at MailClient.Accounts.AccountManager.ReceiveAllInternal(Boolean checkIncludeInGlobalOperations, Boolean fromBackgroundSync)
at MailClient.Accounts.AccountManager.SendAndReceiveAll(Boolean checkIncludeInGlobalOperations)
at MailClient.Accounts.DesktopAccountManager.timerSendAndReceive_Tick(Object sender, EventArgs e)
at System.Windows.Forms.Timer.TimerNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(HWND hWnd, MessageId msg, WPARAM wparam, LPARAM lparam)
at Windows.Win32.PInvoke.DispatchMessage(MSG* lpMsg)
at System.Windows.Forms.Application.ComponentManager.Microsoft.Office.IMsoComponentManager.FPushMessageLoop(UIntPtr dwComponentID, msoloop uReason, Void* pvLoopData)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(msoloop reason, ApplicationContext context)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(msoloop reason, ApplicationContext context)
at System.Windows.Forms.Application.Run(ApplicationContext context)
at MailClient.Program.<>c.b__205_3()
at System.Windows.Forms.Control.InvokeMarshaledCallbackDo(ThreadMethodEntry tme)
at System.Windows.Forms.Control.InvokeMarshaledCallbackHelper(Object obj)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Windows.Forms.Control.InvokeMarshaledCallback(ThreadMethodEntry tme)
at System.Windows.Forms.Control.InvokeMarshaledCallbacks()
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
at System.Windows.Forms.ContainerControl.WndProc(Message& m)
at System.Windows.Forms.Form.WndProc(Message& m)
at MailClient.Common.UI.Forms.BaseForm.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(HWND hWnd, MessageId msg, WPARAM wparam, LPARAM lparam)
at Xilium.CefGlue.Interop.libcef.run_message_loop()
at MailClient.Program.Main(String args)
GUIStatus_Exception_Reported = True

-----------End log ---------

Thanks!

Hmmm, very strange. It seems to have cleared itself up, without doing anything more than closing em Client and then reopening it! Outlook calendar has now sync’ed successfully with no errors. If anyone has done anything at the em Client server end, then Thank you!