Please see https://forums.bitfire.at/topic/1674/what-is-the-2-letters-after-the-account-name-for-address-books and the links there (especially the manual)
Most of my contacts are synced from Owncloud but few are not. I can’t find any relation between the contacts which are not synced. The issue should not be related to Owncloud has I used another cardav app before without issue.
Is it possible to collect some logs in order to identify the issue?
Owncloud version: 8.1.0
Davdroid version: 0.8.1 (from fdroid)
Phone: Cyanogen 11 M11
I guess that this is a duplicate #578, as @untitaker said. Please follow up there.