we have 5 departments, every department has it´s own address book on our nextcloud server, sharing it read-only with all the users. In DAVdroid 1.9-ose on devices with Android 7 (Samsung S5 neo or A5) every user can select the address books he wants to see on his device.
Many users do not select all available address books, so they do not have so many contacts on their device.
Sometimes they need a contact from another department, so they just select this additional address book in DAVdroid, wait some moments, and they appear on the device. Works fine!
But this contacts stay at the device, even when they unselect the additional address book. Manuall sync or waiting a day does not help.
How can they remove the local contacts (without affecting the contacts on the server)?
Thanks for any ideas!