A few days back it looks like the Outlook sync doesn't work at all anymore. My outlook calendar is frozen in a previous state on my phone and when I added the app to a new computer, it doesn't populate it at all. Running on Android and two different Windows PCs.

Nullable object must have a value.

System.InvalidOperationException: Nullable object must have a value. at System.ThrowHelper.ThrowInvalidOperationException_InvalidOperation_NoValue() + 0x2d at System.Nullable`1.get_Value() + 0x12 at CalendarApp.MicrosoftGraphProvider.CachedMicrosoftAppointment.GetModifiedOccurrences() + 0x147 at CalendarApp.ProviderBase.CachedAppointment`1.SetRecurrenceEndDate() + 0xe5 at CalendarApp.ProviderBase.CachedAppointment`1.get_CurrentFieldValues() + 0x3c at CalendarApp.ProviderBase.CachedAppointment`1.SetRecurrenceEndDate() + 0x3a at CalendarApp.MicrosoftGraphProvider.CachedMicrosoftAppointment.AddOccurrence(Event) + 0x126 at CalendarApp.MicrosoftGraphProvider.MicrosoftGraphAccount.d__7.MoveNext() + 0xad6 --- End of stack

Overall great app but I have one problem: the description of features says it is possible to select a different color for a specific appointment. However, this option is disabled in the exchange and in doodle calendars. In Gmail calendar this option is active but doesn't work.

no reminders popup, i have tried re doing them and nothing helps. it worked when first installed, but now has stopped. any ideas. ?

Hi

I am trying to buy premium version but can not. While processing, it asks about address details, and  under country only UK is available.

Best regards,

I scheduled an event and saved it just now.    Subsequently, I realized that the event is recurring.  I don't see any way to add recurrence to the event.  Please make it possible to add recurrence to an event. 

Any ideas how to fix it?

401 Unauthorized when Exchange Server NtlmMinClientSec is set to 128bit (0x20000000).

Please support stronger encryption. 

I was trying to sync my calendar from my email service provider Posteo.de with OneCalendar. However, I get the following error message below. I get the same error when I am trying to sync my calendar on my iPhone. (I changed a few details in the error message where my user ID was shown.)

Could the reason be that there is something wrong with events that I imported from my old Google Calendar into my current Posteo Calendar?

Thank you in advance!

Thanks for the great app! The moon display does not seem to work for certain "Scale and Layout" and resolution combinations.

Environment Computer:UX371EA OS:Windows11 One Calendar:2022.218.1.0 (x64)

The Calendar can not be synchronized anymore. Following error message is shown : 

qte 

CalendarApp.CalDavProvider.DavAccountRequestException: Nicht zulässig (403).

Der Antwortstatuscode zeigt keinen Erfolg an: 403 (Forbidden). : <?xml version='1.0' encoding='UTF-8'?><D:error xmlns:D="DAV:" xmlns:cosmo="http://osafoundation.org/cosmo/DAV"><cosmo:forbidden/></D:error> ---> CalendarApp.Common.Net.HttpException: Nicht zulässig (403).

Der Antwortstatuscode zeigt keinen Erfolg an: 403 (Forbidden). ---> System.Exception: Nicht zulässig (403).

Der Antwortstatuscode zeigt keinen Erfolg an: 403 (Forbidden). at System.Runtime.InteropServices.McgMarshal.ThrowOnExternalCallFailed(Int32, RuntimeTypeHandle) + 0x21 at __Interop.ComCallHelpers.Call(__ComObject, RuntimeTypeHandle, Int32, Void*) + 0xbe at __Interop.ForwardComStubs.Stub_2[TThis, TResult](__ComObject, Int32) + 0x37 at Windows.Web.Http.HttpResponseMessage.EnsureSuccessStatusCode() + 0x18 at CalendarApp.Common.Net.CalendarHttpClient.<ExecuteRequest>d__29.MoveNext() + 0x82d

--- End of inner exception stack trace --- at CalendarApp.Common.Net.CalendarHttpClient.<ExecuteRequest>d__29.MoveNext() + 0x18b0 --- End of stack

I'm getting a sync error on the first launch of OneCalendar in Windows 11 when attempting to connect with iCloud calendar.  In the same calendar session, if I force a second sync, there is no error, and the calendar seems to function normally.  I have attached the trace, with my specific calendar info replaced by pound signs.

Also, if I close OneCalendar and re-launch, the sync error does not occur.  After that, it appears that the sync error occurs on every other launch of the calendar.

Error on W10 Pro (21H1)

CalendarApp.ProviderBase.Exceptions.AccountRequestException: Not Found (404)

Occurs every time an event is added or manual synchronisation is selected.

Using Google calendar, also accessed on an Android phone.  Synchronisation appears to be taking place satisfactorily.

Hi,

Just to say I have synchronization errors with iCloud on Windows ("Synchronisaton terminée avec 1 erreur"), and one event actually doesn't synchronize.

Also, on another event created in One Calendar directly, the Android app doesn't synchronize with the Windows App - no error message.

Hope this helps fixing the problem.

Hi,

My new employer works with MS 365, when I try to sync there is a security non-compatibility with MS Graph authorisation. In MS Exchange that never happened. It would be great if that non-compatibility would be solved. Nowadays many people use 365 so it may be worth doing so.

An update wiped out my entire system including my One Calendar and appointments.  I have got back most of my system but need this system.  Can you help please as I also do not have a password with the reminder also wiped out.

Calender accept does not seem to work; when I accepted a meeting in Outlook on my PC, it does not seem to sync to OneCalendar. Meeting is in agenda, but it stays in "invitations" on OneCalendar. I don't know what will happen if I click it, don't want to bother my contacts with my technical probz.  

Apparently, "as part of its effort to reduce the risk of cybercrime, Microsoft has imposed that from Saturday, 1 October 2022 applications that only use basic authentication methods will be blocked from interacting with Mail Exchange Online system." Hence I cannot use OneCalendar with Exchange any more. 

I entered an event for a shared calendar. After a while, it occurred twice or even three times in parallel (with different colors). When I deleted one, the other one later on disappeared as well. Maybe that problem (which came only with some delay) was caused by the second PC (of my colleague) using that calendar.

Within Google, I have different Calendars set up. I can only view the "Main" Google calendar here.

For example - I have one for my Pets, and one for Appointments and one for Money. I cannot see them when linking my Google Calendar.