Problem
As a Linux user you can mount the drive (formally known as infostore) folder but changes are not synchronized back to the Open-Xchange server.
Solution
Edit /etc/davfs2/davfs2.conf and insert
use_locks 0
if_match_bug 1
debug http
umount and mount again:
mount -t davfs https://<myserver.com>/servlet/webdav.infostore /mnt
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