Ik gebruik app al jaren maar nu weer na een paar dagen probleem synchronisatie Outlook.

het was een paar dagen weer goed maar werkt nu weer slecht.

One Calendar is no longer usable on my iPhone15 Pro.

1. Sync error with outlook calendar linked to outlook.com email address.

2. Uninstalled One Calendar app, reinstalled, same problem.

3. Removed MS outlook account calendar from One Calendar app

4. Re-added MS outlook account calendar to One Calendar app, new error

5. "Error adding your MicrosoftGraph account: An internal server error occured. The operation failed.

6. One Calendar has permanently lost access to my outlook calendar, making the app no longer functional on iOS.

7. Is this something that can be fixed, or should we seek refunds via the app store?

There is no tray icon in Win11 Business and it cannot be activated.

Is it a bug? Or do I need to pay for the premium app to get in into the tray?

I don't want to pin One Calendar to the taskbar.

During the sync. proces this message appears:

unique constraint failed ciexpanded_data.uniquemodelid

Since a couple of weeks i got a sync issue with an outlook calendar. All items (as far as i can see) do sync however after a while a sync / constraint error is reported.

Reinstalling the app does not solve the issue, also no issues appear with other mailboxes.

Any idea what is causing it or more importantly how i can resolve it. 

Thanks in advance for your support!

Best regards,

Albert

When opening an appointment's details window, I can't change the size of the window. I put a lot of details in my "description" box, and it's super small in the window that opens.

Je suis connecté avec mon compte apple et j'ai un compte onecalendar pro. Aujourd'hui j'ai ajouté un événement sur mon Iphone et un sur mon ordinateur(Windows) et ca ne s'est pas synchronisé ni d'un côté ni de l'autre.

Prima Kalender aber leider kann man keine Aufgaben erstellen!

My own appointments are viewed as external appointments in the app after being entered in Outlook on my laptop and then synchronized on my smartphone. Although I don't invite anyone to the appointments and only use them as reminders for myself. I can then falsely confirm or reject them. If I do this, the app returns problems. When I enter the same appointments directly in the app it works perfectly normal. I recently added a new calendar to one of my synronized accounts and since then I am experiencing this problem.

I am using version 5.6.0 (400201) on a Samsung

Hello, For the past few days, I have received a “500, Internal Server Error“ message (that I have listed in my Subject Heading).  I have attached four sequential error message details for you.   I hope that you can help me. Sincerely,  

Bruce Glazer 

I'm trying to synchronise my Nextcloud contacts and calendar with my Android phone. I use DAVx5 and it works very well with the contacts app and the calendar app. However, I can't integrate it anywhere in OneCalendar because access via DAVx5 is apparently not possible. It can't be that you can't access device accounts. Is this a programme error? Oh yes, you can specify Nextcloud under Accounts, but this did not work with all variants and settings. Too bad, these problems/errors will probably force me to look for an alternative.

Translated with DeepL.com (free version)

This calendar has deleted past events. I don’t know how to get them back as I have redownloaded all of the same calendars 

The description pretty much says it all. I have several calendars successfully syncing to One Calendar for Android from different sources, two of them are from Office 365. All the appointments sync correctly except any recurring appointments don't sync to One Calendar. 

It's not possible to change recurring appointments

Ik woon in België, maar ik kan de Nederlandse feestdagen niet veranderen in de Belgische feestdagen. Hoe los ik dat op? ...

Hi there, since a few weeks I can't sync anymore with my exchange server at Ionos hosting. I tried to remove the account in the OneCalendar app and even deleted and reinstalled the app.

Now I get the following error message when I try to connect to the exchange server:

"Error while adding your Exchange account: net_http_ssl_connection-failed".

I also tried to use OneCalendar without validation of the certificate with the same result.

I bought several premium versions of OneCalendar for my family to sync on all devices. Would be great if this works again ASAP.

it shows sync error numerous times