KDav-Issue with emClient

Mornsgrans

Hello,
I have instaled KDav in my UCS-Kopano system - the KDav-package is very helpful.

Unfortunatelly I found an issue, but I am not really sure, whether it is caused by emClient or Kdav or something else:
My szenario exists of my UCS-Kopano server, two client computers and an Android phone.

PC1: Windows 10, Outlook 2007 (IMAP) with CalDAV-Synchronizer as Addin
PC2: Windows 10, eClient (IMAP) with builtin CalDAV/CardDAV
UCS-Server with Kopmano, Caldav and KDav
Huawei P10 with latest Android

I can create Tasks and Calendar-entries on all devices and they become synchronized without problems.

I can create contacts on Android and PC1 with Outlook 2007 and they become synchronized to all devices - even to PC2.

If I create a contact on PC2 it appears for one second and becomes deleted, after synchronizing with KDav-server.
Strange: Deleting a contact works, so it seems not to be a permission-problem.

The setting of the contact-access is the same on PC1 and PC2:
https://dav.meinserver.de:8443/addressbooks/vw/Kontakte

Enclosure you will find the links to my kdav.log files, because my posting will be too large, if I post the logs.

PC1 Outlook 2007 with DAV-Synchronizer, where sync works:

https://www.dropbox.com/s/5ws1sbdjprdulzr/CalDAV-Synchronizer.txt?dl=0

and now the log of PC2-sync, where the added contact becomes deleted after sync:

https://www.dropbox.com/s/6fxrf83b478d6vl/CARDDAV-emClient_deletes_Vcards .txt?dl=0

I found an older thread in emClient-forum, where a similar problem appeared caused by bugs in horde (not on my UCS-server) and sabre:
https://forum.emclient.com/emclient/topics/carddav_server_contacts_not_showing_in_em_but_when_we_create_contact_on_em_it_is_getting_synced_on_carddav

I will be very appreciated, if you can help me.

fbartels

Repost of https://forum.kopano.io/post/13399