Synchronization Issue completed recurring tasks from Tbird to outlook.com-account

[mtrBuhTig]

Your environment

Windows 10 (64Bit), AvastOne Antivir
TbSync version: 4.11 Provider for Exchange ActiveSync v4.12
Thunderbird version: 128.6.0esr (64-Bit)
2 IMAP eMail-accounts (ionos, 1&1)
1 Outlook.com/Office365/ExchangeOnline account (no paid subscription) used for calendar, tasks, contacts (not activated as email-account in TBird, only activated in tbsynch aktiviert)
Android 14 Smartphon with Nine eMail&Caledar App <>

Expected behavior

Recurring Tasks (dayly, weekly, ...) marked completed in TBird are shown completed in my outlook.com-account after synchronization with tbsych and will be synchronized accordingly with other devices/applications.
Changes in descriptions/details to recurring task will be be correctly synchronized with outlook.com-account as well.
All data should be in synch in Tbird on PC/Laptop (both with different ActiveSyc DeviceID), on outlook.com-account/ToDo and Android Smartphon/Nine eMail&Caledar.

Actual behavior

Recurring Tasks (dayly, weekly, ...) can be created in Tbird and correctly synchronized to oututlook.com-account (fine).
Recurring Tasks can be marked as completed in Tbird, are shown as completed in Tbird (fine)
Synchronization of data from Tbird with tbsych does not show sync-errors, but data in outlook.com-account is not changed/updated. Later changes to task (e.g. on smartphone) and synchronization with outlook.com-account will update data and after sync with Tbird mark task previosly marked completed as not completed.

Similar with description/details to recurring tasks

Steps to reproduce

• Create recurring tasks (dayly, weekly, ...) in Tbird
• Syncronize with outlook.com-account
• Check data/tasks online in outlook.com-account (use ToDo - should be fine)
• Mark recurring tasks (dayly, weekly, ...) completed in Tbird (should be shown as completed)
• Syncronize with outlook.com-account
• Check data/tasks online in outlook.com-account (use ToDo - should show task as not completed - no shanges)
• Change task online in outlook.com-account (use ToDo - don't mar as completed)
• Syncronize outlook.com-account with Tbird, Task should be shown as not completed

To help resolving your issue, enable debug logging (TbSync Account Manager -> Help) and send me the debug.log via e-mail (use the title of your issue as subject of the email).
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