I connected the backends IMAP against an IMAP server and cardDAV and calDAV against an owncloud instance.
When I now connect with a device to z-push I can see all calendars on the device but all of them are empty. The addressbook is empty as well.
When I create a new appointment on the device (in this case outlook 2016) the new appointment is written to the calendar in owncloud. But appointments that are created with other clients (like the web frontend) are not showing up in the calendar on the device connected with z-push.
The same is with contacts. When I create them in outlook in syncs them to ownCloud but all contacts created with the web frontend are not showing up in outlook.
What I find in the log is following entry
Fatal error: /usr/share/z-push/include/mimeDecode.php:477 - Allowed memory size of 134217728 bytes exhausted (tried to allocate 24218000 bytes)
Any ideas why the server side existing appointments and contacts are not showing up on the device?