When you get an error like "xfs_quota: cannot set limits: Function not implemented" into new installed DirectAdmin on an ES7 box
added usrquota,prjquota to /etc/fstab, /home partition
2) umount /home
3) mount /home
solved
Then you must have like below:
#
# /etc/fstab
# Created by anaconda on Sun Dec 13 10:19:48 2015
#
# Accessible filesystems, by reference, are maintained under '/dev/disk'
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
#
/dev/mapper/centos_37--97--129--219-root / xfs defaults,uquota,gquota 0 0
UUID=913a5467-da0c-4d6b-840a-682471c7674c /boot xfs defaults 0 0
/dev/mapper/centos_37--97--129--219-home /home xfs defaults,usrquota,prjquota0 0
/dev/mapper/centos_37--97--129--219-swap swap swap defaults 0 0