Yes, I think you’re right.
I checked some other apps; all of them were synchronized on November 8th for the last time - which is exactly the date when the phone was updated to Android 6.0.1 Marshmallow. Therefore it might be a problem caused by this release!?
All-day tasks with DURATION: "timezone is null!"
I posted following problem to the OutlookCalDavSnchronizer-Community because I thought that the problem were there. But apparently it is not:
I sync a Task with a start and end date via OutlookCalDavSnchronizer to my Baikal-Server. Afterwards Davdriod would like to update the Task on my Android Handy but it fails with the following error:
If you need help too better reproduce the problem I can give you access with a temporary user account to my server. Then you can sync at task which was already uploaded by OutlookCalDavSnchronizer. Please send me a PN.
@aratarorome Can you please post the related VTODO?
@aratarorome At first, your VTODO contains
which is not allowed. I have replaced it by
DURATION:PT10Mfor testing purposes.
Second, it seems that the Tasks provider has a problem when inserting all-day events with
DURATION. Please follow up at the corresponding opentasks-provider bug report.