@Crack If we’re still talking “Invalid namespace MeetingResponse”, we do have the fix ready, just not the build, but it’s coming soon.
Microsoft appears to have made changes to the AirSync protocol, which brought an onslaught of new errors, and email clients have had to quickly react. I am sorry it’s taking a while till we can send you a fix for the remaining error (that we’re aware of), but I think we’ve done our best to resolve an unexpected situation.
@Kim_Fisher Thanks for the prompt response, and yes, “Invalid namespace MeetingResponse” is still the persistent issue (although there are others that resolve). Greatly appreciate the update and back story, and I feel your pain re Microsoft.
Very much appreciated, that you worked so quickly on that. I have the same problem and would also be very interested to receive the fix once it is ready. Without calendar sync eM Client looses one of the most important features I need.
calendar sync is again not working
What’s the error you’re seeing?
Has this error : invalid namespace MeetingResponse: been fixed yet? I have been without my calendar for nearly 2 weeks now on a paid version with lifetime upgrades.
I’d like it too please, I’ve been complaining about this problem for years
Does it fix this error I am getting with reminders?
eM Client 10.4.5326+97a2e75a43 (Windows)
3:03:29 PM [email protected] [AirSync] MailClient.Storage.Application.OperationException: Synchronization error (SyncStateNotFound)
at MailClient.Protocols.AirSync.AirSyncItemSynchronizer2.Synchronize(IItemSynchronizeContext1 synchronizeContext, Folder folder, CancellationToken cancellationToken)
at MailClient.Protocols.Common.ItemSynchronizer`2.<>c__DisplayClass37_2.b__6(WorkerStatus status, CancellationToken ct)
at MailClient.Protocols.AirSync.AirSyncGenericCommand.Execute(WorkerStatus status)
at MailClient.Commands.Command.Process(WorkerStatus status)
— End of stack trace from previous location —
at MailClient.Reminders.ReminderManager.<>c__DisplayClass56_0.<<Account_OnlineChanged>b__0>d.MoveNext()
AccountId = null
AccountName = null
RunInPlace = False
GUIStatus_Exception_Reported = True
Outlook/Live calendar and contacts do not show in client after attempting remove/add to fix problem with nonsynch. Will the new build fix this also? Version 9.2.2307
This did not work for me. I have removed and re-added the account and still have the same error. I still have no access to my calendar.
Also tried to remove and re-add the account, nothing solved the problem.
Keep getting errors, in the meantime different ones… but still without calendar.
Any idea when the new build becomes available? @Kim_Fisher
I emailed everyone the patch build. If I accidentally missed you or if you’re only lurking and getting the Invalid namespace MeetingResponse error, message me at [email protected]
Hi Kim, thanks for the hotfix. It seems to have resolved the issue, though now I have a new issue.
When I type in the email body of a reply, or a new mail, EM Client is doubling the first letter of each word that I type… Any ideas?
We also encountered this bug just now 
We’re working on it.
Edited: It is resolved now.
the “fix” didn’t fix my problem, which I’ve had for years. My outlook.com calendar won’t sync to EmClient. No matter what I do, it doesn’t sync. This was no help.
Thanks Kim.
The new hot fix says that I have a newer version installed, how do I uninstall the prior hot fix?