After configuring or making an adjustment to the backups on the machine, all the accounts in WHM show 0M for the quota.
If the backups are configured to be stored in /home on the machine, cPanel & WHM disables the quotas on that partition to improve server performance. We can see this notification in the output of the "/scripts/fixquotas" command on the system:
journaled quota support: kernel supports, user space tools
checking out /home/backup
The system will leave quotas disabled on /home in order to
prevent performance degradation.
You can also see this information in our Backup Configuration pages:
To prevent performance degradation, the system automatically
disables quotas on non-root filesystems that contain a
You should configure the server to not store backups inside /home. The ideal solution would be a separate drive that is only used for backup data.