Samsung Galaxy S2 GT-i9100 with Slim-4.4.2.build-5-OFFICIAL-4068
DAVdroid 0.6.8 installed from the F-droid app
Ubuntu 14.04.1 LTS running Zimbra 8.6 FOSS edition
On my mobile I can sync contacts, but I am unable to star any contacts as like can be done with ActiveSync and local contacts.
When I click star is momentarily shows the star shaded, then returns back to the outlined star.
I'm not sure if this is a limitation of a field existing on the Zimbra server that the DAVdroid needs to utilise or an issue with DAVdroid itself, so please let me know and I'll produce the error with the relevant logs on my device.