Control application settings from server

I manage a Nextcloud instance for a large family. It's a real pain to have to manually configure each client every time I install it, or to have to walk someone through it over the phone.

### Describe the solution you'd like
I'd like to setup group based application defaults, both iOS and Android, so that when a user signs in, the application is automatically configured according to preset settings on the server. Ie, auto upload pictures to this folder using year/mo time stamp folder system, etc.

Configuration changes should be checked regularly, so that if a client app configuration change is made on the server, that change will eventually get synced to the clients, ie, stop upload pictures for example.