Synchronisation files

Hi :slight_smile:
I use the next-cloud software for the synchronization of our clients ‘files and I can’t get the automatic synchronization of a few clients on my pc which makes me do this manually on the clients’ pc with the steps following to receive the backup “Force synchronization + Start backup”
is there a solution to receive automatic backup without doing this manually?

Nextcloud version (Version 2.3.3 (build 1)):