After a lot of new grey hair, I finally managed to set up a server with ZFS as file system. But as there are different user, that use parts of the server as a Time Machine and should have only a limited space. On the old server with EXT4, I could set the quota easily at the file system settings. The ZFS pool also appears there, but i can't set the quota.
Is there no quota with ZFS or how can I set it?