Hi,
i done enable quotas in CentOS 7 (xfs) but i got doubt after reading this guide:
https://help.directadmin.com/item.php?id=557
in CentOS 6 (ext4) i using (usrquota,grpquota) in /etc/fstab like this:
/home ext4 defaults,usrquota,grpquota
also i done same in CentOS 7 (xfs)...