I use Davdroid both on a Galaxy S7 Marshmallow and Huawei P8lite Marshmallow.
On the S7 all goes well and automatic background caldav syncing with Synology Diskstation and Owncloud works like a charm.
However on my P8 lite, manual syncing does work for both caldav servers but not the autmatic background syncing.
Anyone an idea what can be wrong. Do I have to enable or assign rights to something?
Thanks for helping me!